traccar-manager-android/app/src/google/AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="org.traccar.manager">

    <application
        android:name=".GoogleMainApplication"
        tools:replace="android:name"
        tools:ignore="GoogleAppIndexingWarning">

        <meta-data
            android:name="google_analytics_adid_collection_enabled"
            android:value="false" />

        <meta-data
            android:name="com.google.firebase.messaging.default_notification_channel_id"
            android:value="@string/notification_channel_id" />

        <meta-data
            android:name="com.google.firebase.messaging.default_notification_icon"
            android:resource="@drawable/ic_stat_notify" />

        <service android:name=".ManagerMessagingService">
            <intent-filter>
                <action android:name="com.google.firebase.MESSAGING_EVENT" />
            </intent-filter>
        </service>

    </application>

</manifest>