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

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



Change-Id: I2842c8e25c8d6f5e1de47947aa469e74dd3195c2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>