Changes Hub quick picker to get current wallpaper from preferences am: a0eb054ffd

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/22160507

Change-Id: I4d4da62b4cb9cf29fc6d5d4c9e85bd954d6dcd4f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>