Updated expanded bubble menu animation.

Added logic to the handle view and menu view to implement the updated
animation specifications.

Fixes: 345687667
Flag: com.android.wm.shell.enable_bubble_bar
Test: BubbleBarHandleViewTest
Test: Manual. Have few bubbles in the bubble bar. Expand one bubble and
click on the handle view. Click anywhere outside of the menu. Click
another bubble, observe handle view is properly placed. Click on the
handle view.
video: http://recall/-/gx8ASgewUeUS3QYohfrd1J/5dgZCNbnB9LxtPrpP6cUI

Change-Id: Id9a5251792d05f45b515f0dfcf39d736f410a7dc