Merge "Migrate Platinum tests to inherite from new Flicker Service Splitscreen...

Merge "Migrate Platinum tests to inherite from new Flicker Service Splitscreen tests" into udc-qpr-dev am: 923e046a am: 5576f881

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23781303



Change-Id: I18710575c08ba3f49fd7e86f1783f79ecc017cf2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>