Don't double-set keyframe values when Property exists

There is logic in PVH.setupValue() that sets the value of
the appropriate keyframe from a Property, if that Property object
exists for the animator. But after that is done, it goes ahead and sets
the same keyframe value based on the getter for the target object.
This is not only redundant; it is wrong (in the odd situation in which
a getter would return something different than Property.get()).

The solution is to return early once we've set the value with the
Property object.

Issue #26471646  PropertyValuesHolder uses reflection in setupValue when a Property is being used

Change-Id: I12634a25661400f13f44872ba17625b32e93ca19