message: Postponed transition only if shared elements
  Otherwise it gets stuck because transition isn't started if no shared elements
diff: @@ -34,11 +34,10 @@ public class SceneActivity extends Activity implements DefaultHardwareBackBtnHan
  mReactRootView.startReactApplication(getReactNativeHost().getReactInstanceManager(), appKey, props);
  setContentView(mReactRootView);
  if (sharedElements != null ) {
  + this.postponeEnterTransition();
  SharedElementTransitioner transitioner = new SharedElementTransitioner(this, sharedElements);
  mReactRootView.getRootView().setTag(R.id.sharedElementTransitioner, transitioner);
  }
  - if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
  - this.postponeEnterTransition();
  }
  private ReactNativeHost getReactNativeHost() {
  