Merge "Fix wallpaper flicker when quick switching apps using taskbar swipe"...

Merge "Fix wallpaper flicker when quick switching apps using taskbar swipe" into udc-dev am: 36208fb4 am: 1f3f53e2 am: c71d7ff6

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23262476



Change-Id: I47d2655153874f4e87965da33073e815551ef3a5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>