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: d52dd815

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



Change-Id: Iaacfcc04fd87a87d958e18418942467c091bd691
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>