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: b000e23f am: 0767d394 am: 0241ed23

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



Change-Id: I9fe5ba4228a7054a1b6c99dfad6e3ca84daab4da
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>