Merge "Keep a separate accessibility focus for proxy-ed displays." into udc-dev am: e7898dc2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21521958



Change-Id: Ia41866d28176225c655dadaeaf20d6b76763986c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>