Merge "Lock display refresh rate when primary range is a single rate." into rvc-dev am: a9e0d8a9 am: 92b1bb33

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/11494828

Change-Id: I60972ce3a37d477a61dbd701e0feeedaabc0a8a9