Merge "Add "Broadcast" button at output switcher" into tm-dev am: a2a4b30f am: 1ffa17cc

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17394615



Change-Id: Ibfddbb78858c4c45017682e1fa21f12db70a9573
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>