feat(edt): Use sampled lightness for Status Bar

This is currently enabled only when the user has enabled the dark theme
accessibility feature that inverts certain light theme apps to an
automatically-generated dark theme.

Fix: 379760792
Bug: 365120736
Flag: com.android.systemui.status_bar_region_sampling
Test: StatusBarModeRepositoryImplTest
Test: StatusBarRegionSamplingInteractorTest
Test: StatusBarRegionSamplingViewModelTest
Change-Id: Idf6d34840ee2bc9bca1ca0d0c44ad930ed6989cb