Merge "Execute flicker tests with device without wallpaper" into tm-dev am: 759d7606

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17745135



Change-Id: I3a4b2747cda8043f7d0a22013349557e94e6a30f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>