app: [android] replace OnFocusChangedListener with onPause/onResume

References: https://lists.sr.ht/~eliasnaur/gio/%3CCAMAFT9Uyh_JWrkQQt+AmekJWFBqhZPsP_3ZxC1fUNB+=VGGorw@mail.gmail.com%3E
Signed-off-by: CoyAce <akeycoy@gmail.com>
Signed-off-by: Elias Naur <mail@eliasnaur.com>

app/GioActivity.java

@@ -48,6 +48,16 @@ public final class GioActivity extends Activity {
 		super.onStop();
 	}
 
+	@Override public void onPause() {
+        super.onPause();
+        view.pause();
+	}
+
+	@Override public void onResume() {
+        super.onResume();
+        view.resume();
+	}
+
 	@Override public void onConfigurationChanged(Configuration c) {
 		super.onConfigurationChanged(c);
 		view.configurationChanged();