Merge "Add utility for isWallpaperSupported." into tm-dev am: 9417012064 am: ae22885279

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/17303344

Change-Id: I1fe568e2c8f577ce0e938e7152cd9fe3aa23c808
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>