5464ce0084
Include unit test to check that view properties are set to expected values at the end of an unstash animation. Add tests to check that alpha for bubbles and background changes separately during unstash and stash animations. Bug: 345488489 Test: TransientBubbleStashControllerTest Flag: com.android.wm.shell.enable_bubble_bar Change-Id: Ifd10d4524128d42d23fe67c0eff2c4ae16d3b27b