Remove static initalizer work for a11y color repos

The test infra prohibits static variables to do heavy work at
initalization time.

Fixes: b/319721087
Flag: aconfig com.android.systemui.qs_new_tiles DEVELOPMENT
Test: atest ColorInversionRepositoryImplTest ColorCorrectionRepositoryImplTest
Test: atest SystemUiRoboTests
Change-Id: I1e453e91c45cac6c9a8aa86d4cdfc992dae7d734