Move checking for new version to MainAcitvity

When the service is started from the Application class, the app might be still in the background. This is definetly not the case when MainActivity.onCreate() is called.

Fixes #7227

app/src/main/java/org/schabi/newpipe/App.java

@@ -43,8 +43,6 @@ import io.reactivex.rxjava3.exceptions.UndeliverableException;
 import io.reactivex.rxjava3.functions.Consumer;
 import io.reactivex.rxjava3.plugins.RxJavaPlugins;
 
-import static org.schabi.newpipe.CheckForNewAppVersion.startNewVersionCheckService;
-
 /*
  * Copyright (C) Hans-Christoph Steiner 2016 <hans@eds.org>
  * App.java is part of NewPipe.
@@ -113,9 +111,6 @@ public class App extends MultiDexApplication {
                 && prefs.getBoolean(getString(R.string.show_image_indicators_key), false));
 
         configureRxJavaErrorHandler();
-
-        // Check for new version
-        startNewVersionCheckService();
     }
 
     @Override

app/src/main/java/org/schabi/newpipe/MainActivity.java

@@ -20,6 +20,8 @@
 
 package org.schabi.newpipe;
 
+import static org.schabi.newpipe.CheckForNewAppVersion.startNewVersionCheckService;
+
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
@@ -163,6 +165,9 @@ public class MainActivity extends AppCompatActivity {
             FocusOverlayView.setupFocusObserver(this);
         }
         openMiniPlayerUponPlayerStarted();
+
+        // Check for new version
+        startNewVersionCheckService();
     }
 
     private void setupDrawer() throws Exception {