Add display white balance enabled methods to CDS

There needs to be a single source of truth about whether DWB is
enabled or disabled.

Bug: 123930917
Test: atest FrameworksServicesTests:DisplayWhiteBalanceTintControllerTest

Change-Id: If634b46c2d0da123901bd5833e2114d958957540
(cherry picked from commit ff6770d669399f2cbb8723fe1079e82ee0d9d232)
5 files changed