End window animation to home when handler invalidated

We did this already for mCurrentShift, which is used for all animations
except home animation. Now we do it for the home animation as well to
ensure we are properly cleaned up for the next interaction.

Test: Swipe up to home and double tap nav region before animation
finishes. Before, this would return to the app you swiped up from but
was in a broken state where subsequent swipes were ignored. Now we
jump to the home screen and remain there.

Bug: 130802487
Change-Id: I98a2e71a1791f5580451c94a35af98da193ff12f