Merge "Add a flicker test to verify split-task transition after unlocking"...

Merge "Add a flicker test to verify split-task transition after unlocking" into udc-dev am: af4534f6 am: 6e4fd865

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23368299



Change-Id: I218eff46c1d1976a3ef73523b0b67e9d32b08a01
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>