Merge "Add strings for TV PiP accessibility." into tm-dev am: 4a4c8c38a0

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18488305

Change-Id: Id82c6ba8030794233327922b5de04b66f8910b74
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>