Fix crashing bugs

Signed-off-by: Mario Danic <mario@lovelyhq.com>

app/src/main/java/com/nextcloud/talk/activities/BaseActivity.java

@@ -219,12 +219,4 @@ public class BaseActivity extends AppCompatActivity {
         super.onStop();
         eventBus.unregister(this);
     }
-
-    @Override
-    public void onPause() {
-        super.onPause();
-        if (!disposable.isDisposed()) {
-            disposable.dispose();
-        }
-    }
 }

app/src/main/java/com/nextcloud/talk/controllers/SettingsController.java

@@ -392,7 +392,6 @@ public class SettingsController extends BaseController {
                 screenLockTimeoutChoicePreference.setEnabled(false);
                 appPreferences.removeScreenLock();
                 appPreferences.removeScreenLockTimeout();
-                screenLockTimeoutChoicePreference.setValue("0");
                 ((Checkable) screenLockSwitchPreference.findViewById(R.id.mp_checkable)).setChecked(false);
                 screenLockSwitchPreference.setAlpha(0.38f);
                 screenLockTimeoutChoicePreference.setAlpha(0.38f);