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

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



Change-Id: I8ffe5f6501e8a2608c9b4c5a6a3c7ea99dcfba85
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>