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: 8b1160e4 am: 33d293a2 am: b6a02345

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



Change-Id: Ia39a0ce62c84bdd236f2b4dc7dd3136d0942e70e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>