message: Defaulted transition if invalid key supplied
diff: @@ -33,6 +33,8 @@ class SharedElementTransitioner {
  else {
  String packageName = activity.getApplicationContext().getPackageName();
  int transitionId = activity.getResources().getIdentifier(transitionKey, "transition", packageName);
  + if (transitionId == 0)
  + transitionId = activity.getResources().getIdentifier("move", "transition", packageName);
  transition = TransitionInflater.from(activity).inflateTransition(transitionId);
  transitions.put(transitionKey, transition);
  }
  