Merge "Fix flicker when create split from taskbar" into tm-qpr-dev am:...

Merge "Fix flicker when create split from taskbar" into tm-qpr-dev am: 417cc2db am: ad9f2eab am: 19aac235 am: 65daa35c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22149375



Change-Id: I97b22958cbfbeb1ce7e8e0b2e163fa337efb1346
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>