Stash handle alpha animator was set to control the visibility of the
view. This caused issues with the state as sometimes the alpha animation
conflicted with the state of the bubble bar. And caused the handle to be
visible when the bubble bar (or handle) should not be.
Remove the ability for the handle alpha animator to manage the
visibility. We already have logic in place to ensure that the stash
handle is visible or invisible based on the state. And it is not needed
for the animator to manage it.
Bug: 392121302
Flag: com.android.wm.shell.enable_bubble_bar
Test: atest NexusLauncherRoboTests
Test: move an app to bubble, move it back to fullscreen, check that
handle is hidden
Test: check that handle is hidden and shown when in app and opening
notif shade
Test: check that handle is hidden and shown when in app and locking and
unlocking device
Test: check that handle is shown when receiving bubbles in app and the
bar stashes after showing new bubbles
Change-Id: I4af8b4fa38f63b3cbc01f9cf59e66d7fc651ab13
Ats Jenk
f46ebe0378