Revert^2 "Apply overlay changes with config change"

This reverts commit fa5ab2d2.

Reason for revert: Was not the cause of the test failure

Fixes: 189100984
Test: toggle wallpaper and observe QS has correct colors
Test: launch an app, navigate away from the app, change wallpapers, and
      observe app is relaunched and has correct colors when resumed
Change-Id: Ib3930c06b53f71749ec31784ebe6e8a735a1046d