Adds a flag for getSupportedRefreshRates api

flag to guard either a new behavior of using
values from SurfaceFlinger should be used or not.

BUG: 365163968
Test: atest android.display.cts.DisplayTest
Flag: com.android.server.display.feature.flags.enable_get_supported_refresh_rates
Change-Id: I149e6e51b3b3718ef53e522f1fca5650dbbd8b7b
1 file changed