Merge "Add a flicker test for auto-enter pip from split screen." into udc-dev...

Merge "Add a flicker test for auto-enter pip from split screen." into udc-dev am: 01b189fb am: ec53e81b am: a67d5db8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23503133



Change-Id: I79b3122a25f06ddfbbf799d2fee2874453934612
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>