Call ColorDisplayManager for Extra Dim/RBC state

- Move junit test into unit test folder
- Settings resources ids are different from the junit test ids
so we need to find the correct resource id
- ColorDisplayManager will not update in time before the controller
is checked, and it can't be mocked since it's a final class
Bug: 170970675
Test: manual, atest ReduceBrightColorsPreferenceControllerTest

Change-Id: I57bfdd8294c5b6e147b4e11ae97b6b56f6121343