Merge "WallpaperManagerService - avoid leaking whether a package is installed"

            IWallpaperManagerCallback cb, final int which, Bundle outParams, int wallpaperUserId) {

        final boolean hasPrivilege = hasPermission(READ_WALLPAPER_INTERNAL);

        if (!hasPrivilege) {

            try {

                mContext.getSystemService(StorageManager.class).checkPermissionReadImages(true,

                    Binder.getCallingPid(), Binder.getCallingUid(), callingPkg, callingFeatureId);

                        Binder.getCallingPid(), Binder.getCallingUid(), callingPkg,

                        callingFeatureId);

            } catch (Exception e) {

                // If the calling package name does not match a package installed on the system,

                // an exception is thrown. Don't allow that exception to be thrown, otherwise,

                // there is a difference in control flow that allows calling apps to determine

                // if a package is installed on the device.

                return null;

            }

        }

        wallpaperUserId = ActivityManager.handleIncomingUser(Binder.getCallingPid(),