androidエミュレータへのwebプッシュ

androidStudioのエミュレータへfcmを使ってwebプッシュを送信したいです。
pcのchromeへのwebプッシュは成功しています。
以下、コードです。

firebase-messaging-sw.js

importScripts("https://www.gstatic.com/firebasejs/7.14.4/firebase-app.js");
importScripts(
  "https://www.gstatic.com/firebasejs/7.14.4/firebase-messaging.js"
);

// Initialize the Firebase app in the service worker by passing in
// your app's Firebase config object.
// https://firebase.google.com/docs/web/setup#config-object
firebase.initializeApp({
  apiKey: "AIzaSyCJzLFZEiMIzg1EKt5HzSUZb4Ly_gsQDTk",
  authDomain: "pwatest-a13b8.firebaseapp.com",
  databaseURL: "https://pwatest-a13b8.firebaseio.com",
  projectId: "pwatest-a13b8",
  storageBucket: "pwatest-a13b8.appspot.com",
  messagingSenderId: "165204440072",
  appId: "1:165204440072:web:0e5dfacb7bb4320b288dbd",
});

// Retrieve an instance of Firebase Messaging so that it can handle background
// messages.
const messaging = firebase.messaging();
messaging.setBackgroundMessageHandler(function (payload) {
  console.log(
    "[firebase-messaging-sw.js] Received background message ",
    payload
  );
  // Customize notification here
  const notificationTitle = "Background Message Title";
  const notificationOptions = {
    body: "Background Message body.",
    icon: "/firebase-logo.png",
  };

  return self.registration.showNotification(
    notificationTitle,
    notificationOptions
  );
});

index.js

import firebase from "firebase/app";
import "firebase/messaging";
import "firebase/firestore";

var firebaseConfig = {
  apiKey: "AIzaSyCJzLFZEiMIzg1EKt5HzSUZb4Ly_gsQDTk",
  authDomain: "pwatest-a13b8.firebaseapp.com",
  databaseURL: "https://pwatest-a13b8.firebaseio.com",
  projectId: "pwatest-a13b8",
  storageBucket: "pwatest-a13b8.appspot.com",
  messagingSenderId: "165204440072",
  appId: "1:165204440072:web:0e5dfacb7bb4320b288dbd",
};
// Initialize Firebase
firebase.initializeApp(firebaseConfig);

const messaging = firebase.messaging();
messaging.usePublicVapidKey(
  "BANkA5IJWmPZ68TtZP7mtG9Ts7IokiWGdPzXyoWaUA5AVkt7gx2ZmkRv7YGdjj9UNbQsWEzgpIH8UN9hKOFpUDc"
);

var db = firebase.firestore();
var usersRef = db.collection("users");

navigator.permissions.query({ name: "notifications" }).then((status) => {
  if (status.state === "granted") console.log("許可済み");
  else if (status.state === "prompt") console.log("ユーザ確認待ち");
  // if (status.state === 'denied')
  else console.log("拒否済み");
});

messaging.requestPermission().then(function () {
  messaging
    .getToken()
    .then((currentToken) => {
      if (currentToken) {
        console.log("ok");
      } else {
        // Show permission request.
        console.log(
          "No Instance ID token available. Request permission to generate one."
        );
      }
    })
    .catch((err) => {
      console.log("An error occurred while retrieving token. ", err);
    });
});

messaging.onMessage((payload) => {
  console.log("Message received. ", payload);
  // ...
});

manifest.json

{
    "name": "ServiceWorker Push",
    "short_name": "ServiceWorker Push",
    "icons": [{
        "src": "./image/black.png",
        "sizes": "192x192",
        "type": "image/png"
    }],
    "start_url": "./index.html",
    "display": "standalone",
    "gcm_sender_id": "103953800507"
}

navigator.permissions.query({ name: "notifications" })で確認したところ"granted"許可済みになっています。
chromeのdevToolのserviceWorckerのpushから送信してみてもダメでした。これはなぜかpcのchromeでも動作しません。
index.jsのmessaging.onMessageのconsole.logは出力されているのでfcmからpushを受け取れてはいると思うのですが、androidの通知が出てきません。

何が原因かご教授ください。