flutter build apk --release に失敗する。

前提・実現したいこと

flutter でリリースビルドのapkを作成したいです。

発生している問題・エラーメッセージ

flutter build apk --releaseを実行すると以下のエラーが発生します。

AQ-S380-MacBookPro:starX teppei.kikuchi$ flutter build apk --release
You are building a fat APK that includes binaries for android-arm, android-arm64, android-x64.
If you are deploying the app to the Play Store, it's recommended to use app bundles or split the APK to reduce the APK size.
    To generate an app bundle, run:
        flutter build appbundle --target-platform android-arm,android-arm64,android-x64
        Learn more on: https://developer.android.com/guide/app-bundle
    To split the APKs per ABI, run:
        flutter build apk --target-platform android-arm,android-arm64,android-x64 --split-per-abi
        Learn more on:  https://developer.android.com/studio/build/configure-apk-splits#configure-abi-split
Plugin project :connectivity_macos not found. Please update settings.gradle.
Note: /Users/teppei.kikuchi/project/flutter/.pub-cache/hosted/pub.dartlang.org/connectivity-0.4.9/android/src/main/java/io/flutter/plugins/connectivity/ConnectivityBroadcastReceiver.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.                    
Note: /Users/teppei.kikuchi/project/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_analytics-1.2.0+1/android/src/main/java/io/flutter/plugins/firebaseanalytics/FirebaseAnalyticsPlugin.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.                      
Note: /Users/teppei.kikuchi/project/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core-0.2.5+1/android/src/main/java/io/flutter/plugins/firebase/core/FirebaseCorePlugin.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.                      
Removed unused resources: Binary resource data reduced from 304KB to 277KB: Removed 8%
                                                                        
FAILURE: Build failed with an exception.                                
                                                                        
* What went wrong:                                                      
Execution failed for task ':firebase_analytics:verifyReleaseResources'. 
> A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade
   > Android resource linking failed                                    
     /Users/teppei.kikuchi/.gradle/caches/transforms-2/files-2.1/3aaf6e5219b7f981ec263df919098c6f/core-1.1.0/res/values/values.xml:142:5-173:25: AAPT: error: resource android:attr/fontVariationSettings not found.
                                                                        
     /Users/teppei.kikuchi/.gradle/caches/transforms-2/files-2.1/3aaf6e5219b7f981ec263df919098c6f/core-1.1.0/res/values/values.xml:142:5-173:25: AAPT: error: resource android:attr/ttcIndex not found.
                                                                        
                                                                        
* Try:                                                                  
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
                                                                        
* Get more help at https://help.gradle.org                              
                                                                        
BUILD FAILED in 1m 17s                                                  
Running Gradle task 'assembleRelease'...                                
Running Gradle task 'assembleRelease'... Done                      78.5s
The built failed likely due to AndroidX incompatibilities in a plugin. The tool is about to try using Jetfier to solve the incompatibility.
Building plugin connectivity...
Running Gradle task 'assembleAarRelease'...                             
Running Gradle task 'assembleAarRelease'... Done                    1.4s


FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring root project 'connectivity'.
> SDK location not found. Define location with sdk.dir in the local.properties file or with an ANDROID_HOME environment variable.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 1s


The plugin connectivity could not be built due to the issue above.

該当のソースコード

/Users/teppei.kikuchi/project/flutter/bin/flutter doctor --verbose
[✓] Flutter (Channel stable, v1.17.5, on Mac OS X 10.15.4 19E287, locale en-US)
    • Flutter version 1.17.5 at /Users/teppei.kikuchi/project/flutter
    • Framework revision 8af6b2f038 (4 weeks ago), 2020-06-30 12:53:55 -0700
    • Engine revision ee76268252
    • Dart version 2.8.4

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
    • Android SDK at /Users/teppei.kikuchi/Library/Android/sdk
    • Platform android-29, build-tools 29.0.2
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.5)
    • Xcode at /Applications/Xcode_11.5.app/Contents/Developer
    • Xcode 11.5, Build version 11E608c
    • CocoaPods version 1.9.1

[✓] Android Studio (version 3.6)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 44.0.2
    • Dart plugin version 192.7761
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)

[✓] Connected device (1 available)
    • Android SDK built for x86 • emulator-5554 • android-x86 • Android 8.1.0 (API 27) (emulator)

• No issues found!
Process finished with exit code 0

dart:pubspec.yaml
1name: starx
2description: A new Flutter project.
3
4# The following line prevents the package from being accidentally published to
5# pub.dev using `pub publish`. This is preferred for private packages.
6publish_to: 'none' # Remove this line if you wish to publish to pub.dev
7
8# The following defines the version and build number for your application.
9# A version number is three numbers separated by dots, like 1.2.43
10# followed by an optional build number separated by a +.
11# Both the version and the builder number may be overridden in flutter
12# build by specifying --build-name and --build-number, respectively.
13# In Android, build-name is used as versionName while build-number used as versionCode.
14# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
15# In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
16# Read more about iOS versioning at
17# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
18version: 1.0.0+1
19
20environment:
21  sdk: ">=2.7.0 <3.0.0"
22
23dependencies:
24  flutter:
25    sdk: flutter
26  carousel_slider: ^2.2.1
27  flutter_svg: ^0.17.4
28  auto_size_text: ^2.1.0
29  pin_entry_text_field: ^0.1.3
30  intl: ^0.16.1
31  indonesia: ^1.0.1
32  keyboard_visibility: ^0.5.6
33  http: ^0.12.1
34  shared_preferences: ^0.5.7+3
35  flutter_launcher_icons: ^0.7.5
36  connectivity: ^0.4.9
37  dio: ^3.0.9
38  firebase_core: ^0.2.5  # add dependency for Firebase Core
39  firebase_analytics: ^1.0.4
40  image_picker: ^0.6.0+9
41  photo_view: ^0.9.2
42  json_annotation:
43  provider: ^4.1.3
44  mime_type: ^0.3.2
45  # The following adds the Cupertino Icons font to your application.
46  # Use with the CupertinoIcons class for iOS style icons.
47  cupertino_icons: ^0.1.3
48
49dev_dependencies:
50  flutter_test:
51    sdk: flutter
52
53  build_runner: ^1.7.3
54  json_serializable:
55  freezed:
56
57flutter_icons:
58  android: "launcher_icon"
59  ios: true
60  image_path: "assets/images/logo_starx.png"
61  image_path_ios: "assets/images/logo_starx.png"
62
63# For information on the generic Dart part of this file, see the
64# following page: https://dart.dev/tools/pub/pubspec
65
66# The following section is specific to Flutter.
67flutter:
68
69  # The following line ensures that the Material Icons font is
70  # included with your application, so that you can use the icons in
71  # the material Icons class.
72  uses-material-design: true
73
74  # To add assets to your application, add an assets section, like this:
75  assets:
76  - assets/images/
77  - assets/svg/
78  - assets/svg/iconDashboard/
79  # An image asset can refer to one or more resolution-specific "variants", see
80  # https://flutter.dev/assets-and-images/#resolution-aware.
81
82  # For details regarding adding assets from package dependencies, see
83  # https://flutter.dev/assets-and-images/#from-packages
84
85  # To add custom fonts to your application, add a fonts section here,
86  # in this "flutter" section. Each entry in this list should have a
87  # "family" key with the font family name, and a "fonts" key with a
88  # list giving the asset and other descriptors for the font. For
89  # example:
90  fonts:
91    - family: Quicksand
92      fonts:
93        - asset: fonts/Quicksand-Regular.ttf
94  # For details regarding fonts from package dependencies,
95  # see https://flutter.dev/custom-fonts/#from-packages