Merge "Wallpaper quick switcher section (2/3)." into tm-qpr-dev am: 420390c53b

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/20847107

Change-Id: Id8fc7969cb1b3fab3738c882fec3f6c447a2eb52
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>