フォアグラウンドサービスの最低限の実装について【Kotlin, Android Studio, バックグラウンドでのアプリ実行】

<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />

<service
    android:name=".TestForegroundService"
    android:enabled="true"
    android:exported="true"></service>
<receiver android:name=".TestForegroundReceiver" android:exported="true">
    <intent-filter>
        <action android:name="（ドメインとアプリ名）" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</receiver>

class TestForegroundReceiver:BroadcastReceiver() {
    override fun onReceive(context: Context, intent: Intent) {
        val targetIntent = Intent(context, TestForegroundService::class.java)
        context.stopService(targetIntent)
    }
}

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val intent = Intent(this,TestForegroundService::class.java)
        startForegroundService(intent)
    }

}

class TestForegroundService: Service(){
    companion object {
        const val CHANNEL_ID = "1111"
    }
    override fun onBind(p0: Intent?): IBinder? {
        return null
    }
    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
        Log.i("Service","onStartCommand called")

        //1．通知領域タップで戻ってくる先のActivity
        val openIntent = Intent(this, MainActivity::class.java).let {
            PendingIntent.getActivity(this, 0, it, 0)
        }

        //2．通知チャネル登録
        val channelId = CHANNEL_ID
        val channelName = "TestService Channel"
        val channel = NotificationChannel(
            channelId, channelName,
            NotificationManager.IMPORTANCE_DEFAULT
        )
        val manager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
        manager.createNotificationChannel(channel)

        //3．ブロードキャストレシーバーをPendingIntent化
        val sendIntent = Intent(this, TestForegroundReceiver::class.java).apply {
            action = Intent.ACTION_SEND
        }
        val sendPendingIntent = PendingIntent.getBroadcast(this, 0, sendIntent, 0)
        //4．通知の作成（ここでPendingIntentを通知領域に渡す）
        val notification = NotificationCompat.Builder(this, CHANNEL_ID )
            .setSmallIcon(R.drawable.ic_launcher_foreground)
            .setContentTitle("フォアグラウンドのテスト中")
            .setContentText("終了する場合はこちらから行って下さい。")
            .setPriority(NotificationCompat.PRIORITY_DEFAULT)
            .setContentIntent(openIntent)
            .addAction(R.drawable.ic_launcher_foreground, "実行終了", sendPendingIntent)
            .build()

        //5．フォアグラウンド開始。
        startForeground(2222, notification)

        return START_STICKY
    }

    override fun stopService(name: Intent?): Boolean {
        return super.stopService(name)
    }
}