We should first decide how we would like to animate dismissal of the
selected bubble, and than implement arrow animation. The issue exists
because background is shrinked without an animation.
Test: Visual
Fixes: 293350516
Flag: ACONFIG com.android.wm.shell.enable_bubble_bar DEVELOPMENT
Change-Id: Ia0cf04671bf9e93c98c45c99a21865055462e6df