Merge "Add sysprop for refresh rate threshold." into sc-dev am: c14d1a9f am:...

Merge "Add sysprop for refresh rate threshold." into sc-dev am: c14d1a9f am: 45def3f3 am: 5248219b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/15084528

Change-Id: Id6faebbfc5892b3d7dd48f734c0199e3e9a27961