[automerger skipped] [automerge] Check for nullness in WallpaperService...

[automerger skipped] [automerge] Check for nullness in WallpaperService onDestroy 2p: 784a9ec8 am: 232e250f -s ours am: ee18577d -s ours am: 513cadeb -s ours

am skip reason: Merged-In I89076da179493fa282f3e59895cfa4f4bfb6bdfc with SHA-1 c3e257fc is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22761496



Change-Id: I7f8ac70af2d99511f5b65e4f543bf0d61804a470
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>