Add TestApi for setRefreshRateSwitchingType

This CLs adds a test API to replicted the behaviour of the
MATCH_CONTENT_FRAME_RATE user setting. This is intended to
be used from CTS.

Bug: 157504046
Bug: 171952409
Test: atest MatchContentFrameRateTest
Change-Id: I90d9a0d019cdb908b3b13328a78fe370676ad064
9 files changed