Sync new Backgrounds app

Change-Id: Ib3cdc787e52775c4fa16ccf895b5c42f3195b77f
Signed-off-by: Joey <joey@lineageos.org>

default.xml

@@ -543,7 +543,6 @@
   <project path="packages/apps/TvSettings" name="LineageOS/android_packages_apps_TvSettings" groups="pdk-fs" />
   <project path="packages/apps/TV" name="LineageOS/android_packages_apps_TV" />
   <project path="packages/apps/UnifiedEmail" name="LineageOS/android_packages_apps_UnifiedEmail" groups="pdk-fs" />
-  <project path="packages/apps/WallpaperPicker" name="LineageOS/android_packages_apps_WallpaperPicker" groups="pdk-fs" />
   <project path="packages/experimental" name="platform/packages/experimental" remote="aosp" />
   <project path="packages/inputmethods/LatinIME" name="LineageOS/android_packages_inputmethods_LatinIME" groups="pdk-fs" />
   <project path="packages/providers/BlockedNumberProvider" name="LineageOS/android_packages_providers_BlockedNumberProvider" groups="pdk-fs" />

snippets/lineage.xml

@@ -32,6 +32,7 @@
   <project path="lineage-sdk/samples/weatherproviderservice/OpenWeatherMapProvider" name="LineageOS/android_packages_apps_OpenWeatherMapProvider" />
   <project path="packages/apps/AppDrawer" name="LineageOS/android_packages_apps_AppDrawer" />
   <project path="packages/apps/AudioFX" name="LineageOS/android_packages_apps_AudioFX" />
+  <project path="packages/apps/Backgrounds" name="LineageOS/android_packages_apps_Backgrounds" />
   <project path="packages/apps/Eleven" name="LineageOS/android_packages_apps_Eleven" />
   <project path="packages/apps/Exchange" name="LineageOS/android_packages_apps_Exchange" />
   <project path="packages/apps/FMRadio" name="LineageOS/android_packages_apps_FMRadio" />