Merge "Wallpaper: Propagate transform hint from WM to BBQ surface" into sc-dev am: 2dfdf43732 am: 8ad4528fa2 am: ce5493aa10

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15372415

Change-Id: I6d09656ade621a659eb0242c2c5961774b7be559