Use Animator cancel instead of end

Animtor's cancel() skips some animator init logic that end() does so
we'd like to use that instead. The on end callback will still set the
animation value to its target end value so this doesn't affect
correctness.

Bug: 132285006
Test: Build and manual test endAnimations
Change-Id: I450a888c7b37a7dc74f24035d9abc5bda1cbbbd8
1 file changed