Added functionality to jump to talk-tab when app is launched via notification

lib/notification/notificationController.dart

@@ -44,6 +44,7 @@ class NotificationController {
   }
 
   static Future<void> onAppOpenedByNotification(RemoteMessage message, BuildContext context) async {
+    NotificationTasks.navigateToTalk();
     NotificationTasks.updateProviders(context);
 
     DebugTile(context).run(() {

lib/notification/notificationTasks.dart

@@ -1,6 +1,7 @@
 import 'package:firebase_messaging/firebase_messaging.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter_app_badger/flutter_app_badger.dart';
+import 'package:marianum_mobile/app.dart';
 import 'package:provider/provider.dart';
 
 import '../model/chatList/chatListProps.dart';
@@ -17,6 +18,6 @@ class NotificationTasks {
   }
 
   static void navigateToTalk() {
-    // TODO Navigate
+    App.bottomNavigator.jumpToTab(1);
   }
 }