[automerger skipped] Push wallpapers on the back during transitions am: 7c3c33a2 -s ours

am skip reason: Merged-In Ie6bd4d18bfe67ca27b791a666d5b0bff6199773c with SHA-1 7bc428e7 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/28287232



Change-Id: I45a07118491d05954323dccd8d1acbf6ba391c37
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>