8d516a80a0
If changing wallpaper when low on memory, retrieving the default wallpaper may return null, which triggers error handling in ImageWallpaper. This error handling tries to perform WallpaperManager.clear(), but for that it needs SET_WALLPAPER permission, which it does not have. For users with apps that auto change wallpaper, this issue can be frequent in low-memory conditions. The solution is to add the permisson. Change-Id: I81503c1667e3952c2dd15599969f7dcc51623e5b