Implement FCM [WIP]

flutter/android/app/src/main/kotlin/com/example/simplecloudnotifier/MainActivity.kt

@@ -1,6 +1,12 @@
-package com.example.simplecloudnotifier
+package com.blackforestbytes.simplecloudnotifier
 
 import io.flutter.embedding.android.FlutterActivity
 
 class MainActivity: FlutterActivity() {
+    onCreate() {
+        GoogleApiAvailability.makeGooglePlayServicesAvailable() 
+    }
+    onResume() {
+        GoogleApiAvailability.makeGooglePlayServicesAvailable() 
+    }
 }