Call end callback for custom rotation anim.

The onAnimationEnd callback was not called when a cutstum animation was
set (e.g: JUMPCUT) causing WindowState.mOrientationChanging to never be
reset to false and drawing being held.

Bug: 142255739
Test: atest PixelCopyTest#testWindowProducerCropTopLeft
Change-Id: If35a0bb0ad94050fba086cb81f8265c0bf0535eb