AndroidManifest.xml

This is the manifest that Xamarin creates when you include Xamarin.Firebase.Messaging.  It's what you get when you
have this in your base AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>
<manifest
	xmlns:android      ="http://schemas.android.com/apk/res/android"
	android:versionCode="1"
	android:versionName="1.0"
	package            ="com.digium.fcmtest2">
	<uses-sdk
		android:minSdkVersion="10" />
	<application
		android:allowBackup="true"
		android:icon       ="@mipmap/icon"
		android:label      ="@string/app_name">
	</application>
</manifest>

(And notice that the Xamarin web doc does suggest adding xml; that's not done yet)

<?xml version="1.0" encoding="utf-8"?>
<manifest
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:versionCode="1"
    android:versionName="1.0"
    package="com.digium.fcmtest2"
    platformBuildVersionCode="25"
    platformBuildVersionName="7.1.1">

    <uses-sdk
        android:minSdkVersion="10" />

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

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

    <application
        android:label="@ref/0x7f07002a"
        android:icon="@ref/0x7f030000"
        android:name="android.app.Application"
        android:debuggable="true"
        android:allowBackup="true">

        <activity
            android:label="FcmTest2"
            android:icon="@ref/0x7f030000"
            android:name="md5a4df965bb052223b8bffbe8833d28151.MainActivity">

            <intent-filter>

                <action
                    android:name="android.intent.action.MAIN" />

                <category
                    android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <service
            android:name="md58bfb1aa39469503fb0aae51136235faf.FcmMessagingService">

            <intent-filter>

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

        <service
            android:name="md5a4df965bb052223b8bffbe8833d28151.FcmIdService">

            <intent-filter>

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

        <provider
            android:name="mono.MonoRuntimeProvider"
            android:exported="false"
            android:authorities="com.digium.fcmtest2.mono.MonoRuntimeProvider.__mono_init__"
            android:initOrder="2147483647" />

        <receiver
            android:name="mono.android.Seppuku">

            <intent-filter>

                <action
                    android:name="mono.android.intent.action.SEPPUKU" />

                <category
                    android:name="mono.android.intent.category.SEPPUKU.com.digium.fcmtest2" />
            </intent-filter>
        </receiver>

        <provider
            android:name="com.google.firebase.provider.FirebaseInitProvider"
            android:exported="false"
            android:authorities="com.digium.fcmtest2.firebaseinitprovider"
            android:initOrder="100" />

        <service
            android:name="com.google.firebase.messaging.FirebaseMessagingService"
            android:exported="true">

            <intent-filter
                android:priority="-500">

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

        <meta-data
            android:name="com.google.android.gms.version"
            android:value="@ref/0x7f060000" />
    </application>

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

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

    <uses-permission
        android:name="com.google.android.c2dm.permission.RECEIVE" />
</manifest>