Merge "[Output Switcher] Add switch confirm dialog" into udc-dev am: b8757952 am: a937b49d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22952407



Change-Id: Iba80983ab17089e39a4c3c4157a30e06219fafa1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>