Merge "Conform the logic to decide wallpaper darkness" into udc-dev am: 4f7f216c am: 8afbc2a0

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/23618530



Change-Id: Id00f487d17c4a053892d6da5d9fad295c664cfa4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>