Color Picker Section Refactor (1/3) am: 68e0a82a98 am: 5242d229ab

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/21224203

Change-Id: Ie0dee87291338b91706390ce8e324991ec2d73c6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>