Revert "SF: Remove refresh_rate_switching flag. With a fix."

Revert "Removing refresh_rate_switching flag"

Revert submission 10239313-b:148427603

Reason for revert: runtime errors. see b/149077559
Reverted Changes:
I5bb964572:SF: Remove refresh_rate_switching flag. With a fix...
I48c82de41:Removing refresh_rate_switching flag

Change-Id: I0be6ed40dc2d07d3cdc1db06e77d037d3ad97b7d
Bug: 149077559
(cherry picked from commit 67df70ab09465b21879ee84247df6a495a1b7a14)