Merge "Restore public visibility of onRefreshRateSettingsChanged" into udc-dev am: 43a386c5 am: bce9e63b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21992150



Change-Id: I39ca1ff483ec9faa068a13b0b4571d68314a7e21
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>