Merge "Divide split screen tests for IW microbenchmark and flicker" into udc-dev am: 7d8d53c8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22896919



Change-Id: I683dc8e05134a336455d5263a464fcccc81a6274
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>