Fix anim done callback not being called sometimes

We should call dispatchFinishedWhenDone in endAnimations instead of
calling dispatchAnimationsFinished as the former will run the listener.
However, we only do this if we were running animations in the first
place.

Bug: 132285006
Test: Build and manual test endAnimations() call
Change-Id: I31afdc4c9e3ef5f56eda6178569d5c264c16ae78