message: Simplified to avoid compiler warning
diff: @@ -94,7 +94,7 @@ public class NavigationStackView extends ViewGroup implements LifecycleEventList
  transaction.add(fragment, "Stack" + getId());
  transaction.commitNowAllowingStateLoss();
  }
  - startNavigation = startNavigation == null ? keys.size() != 0 : false;
  + startNavigation = startNavigation == null && keys.size() != 0;
  if (scenes.size() == 0 || fragment.getChildFragmentManager().isStateSaved())
  return;
  int crumb = keys.size() - 1;
  