It's possible that in the future the peak refresh rate setting will have multiple values (e.g. 90, 120). For that reason, we shouldn't convert it to a boolean like in the previous CLs (ag/24604787, ag/24604847).
- set peak/min refresh rate to infinity if it's the highest refresh rate so that when we restore the setting on another device, we also choose the highest refresh rate
- back up peak/min refresh rate and add validators
- upgrade settings in SettingsProvider
- create a utils class - RefreshRateSettingsUtils
Bug: 211737588
Test: atest DisplayModeDirectorTest
Test: atest ForcePeakRefreshRatePreferenceControllerTest
Test: atest PeakRefreshRatePreferenceControllerTest
Test: atest SettingsBackupTest
Test: atest SettingsProviderTest
Test: atest RefreshRateSettingsUtilsTest
Change-Id: Ie1d8cfc76e42c7d98c4a36743463ccaf3ca5d483
176a63a1db