dispatchAnimationFinished
Method to be called by subclasses when an animation is finished.
For each call RecyclerView makes to animateAppearance(), animatePersistence(), or animateDisappearance(), there should be a matching dispatchAnimationFinished call by the subclass.
For animateChange(), subclass should call this method for both the oldHolder
and newHolder
(if they are not the same instance).
Parameters
viewHolder
The ViewHolder whose animation is finished.