SurfaceFlinger: use scheduler::RefreshRateConfigs in setRefreshRateTo

Use cached values for display configs instead of querying HWC for the
available configs every time we want to change config.

setRefreshRateTo average time reduced from 0.108 ms to 0.032 ms

Test: collected systrace for config changes
Bug: 122906558
Change-Id: I543973ba01df067bd5ad23a2c2ab48b9a90621ae