DO NOT MERGE: Downbranch merge conflict [Output Switcher] Make checkbox disable if a device is not deselectable am: ec0d7f51 am: 660c429c am: a177293b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18179572



Change-Id: Ifba69cd58d37208eee91e1a6255498b98b9aba03
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>