On some devices, it is possible that config_enableWallpaperService is
false, in which then there is no wallpaper service on device. Calling
WallpaperManager#getWallpaperId will then result in an NPE. We should
just do a check and return false.
Bug: 62387789
Test: RoboSettingsTest
Change-Id: I31db6845f06533d92140bf91d0f7fc7e7bedc5c5
- Add the wrapper package and move all wrappers to the wrapper package.
- Get rid of some wrapper interface/impl implementation and have a
wrapper class directly.
Bug: 65634579
Test: make RunSettingsRoboTests
Change-Id: Ic757d8f7bacfa7a034c7e692205bc1dc4b0e1de1