Merge "Don't set ImageWallpaper to home only the first time" into udc-dev am: 4e5473b6

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23845585



Change-Id: I120f73d99980403b2c1b9872a450183c311e288e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>