Merge "Fix black flash when launching dual split activity" into udc-dev am:...

Merge "Fix black flash when launching dual split activity" into udc-dev am: 50875ae2 am: ef5c3e0c am: 291ab4a2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22785676



Change-Id: I4390ee033e310ce9c431978f4b82b1d77fd7b5b2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>