Merge "Prevent WallpaperManager#getBitmap return recycled bitmap." into sc-v2-dev am: d4468037c7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15824230

Change-Id: I04d5d585c9686a9e0db322e3d7a19edff5def4b1