Merge "[Rear display] Disallow talkback focus on Rear mode dialog image" into...

Merge "[Rear display] Disallow talkback focus on Rear mode dialog image" into tm-qpr-dev am: 30279b8c am: aa760de9 am: c2540fda

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22086418



Change-Id: I03093f592d3cb24b9cb100e2a36567ba99e84d51
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>