Update expanded view bounds at the end of anim

Make sure updated bubble bar expanded view bounds are sent to WM at the
end of animation to switch bubbles or when dragging.

Bug: 383350022
Test: atest WMShellRobolectricTests:com.android.wm.shell.bubbles.bar.BubbleBarAnimationHelperTest
Test: atest WMShellMultivalentTestsOnDevice:com.android.wm.shell.bubbles.bar.BubbleBarAnimationHelperTest
Flag: com.android.wm.shell.enable_bubble_bar
Change-Id: I6b3a0d99d0b8b7020b1999bfe3273d368c3b002c