Merge "Incorporate feedback on new wallpaper-related APIs" into nyc-dev
am: 9d37bdcb91

* commit '9d37bdcb91dffbfeebc45ef5ae7724c556cb6864':
  Incorporate feedback on new wallpaper-related APIs

Change-Id: Iea24b4a97c72248c185f8756b8b74b8b60f3c05f