When animating bubble bar from the stash handle, scale the width to the
handle.
Bubble bar is already almost the size of the handle, but a small scale
is still added.
Bug: 345488489
Flag: com.android.wm.shell.enable_bubble_bar
Test: atest TransientBubbleStashControllerTest
Test: slow animations down and unstash and stash bubble bar, observe
that the width of the bubble bar scales down to the handle
Change-Id: I54dc228fa41d4d494bfb15e191d2ba563c0970c7
Ats Jenk
da9e36e4e7