Merge "Convert PowerOptions menu into a dialog and update styling." into rvc-dev am: ee441db39f am: 8537f384e7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11886960

Change-Id: I9c7d813fc8c9195d5c682b6a18e05a55a277504a