Merge "AccessibilityMenuService test class setup & initial test." into udc-dev am: 9142b4d4

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21589901



Change-Id: I66e91851dd4a1d76c2839e0a60adfca75bd5a1b4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>