Merge "Fade in/out taskbar bg alpha when unstash/stashing." into udc-dev am:...

Merge "Fade in/out taskbar bg alpha when unstash/stashing." into udc-dev am: 613cc95c am: 004ed77d am: 7adaa2a3 am: 761b7fab

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/23696768



Change-Id: Ie163ac84259606edd4e600ea6d3bc7a95c5eb6d5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>