Added changes to WallpaperPreviewer for sending the current state in the am: 43b6f49bfa

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/24749074

Change-Id: Id4a5e76e14d6701ea67382b085363101a7eef5d3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>