Add utility for isWallpaperSupported.

Test: Manual
Bug: 223549757
Change-Id: I910ad82ab12790f082525353dbdb86def93e3c04
diff --git a/src/com/android/launcher3/Utilities.java b/src/com/android/launcher3/Utilities.java
index 9bc3d15..972a2e4 100644
--- a/src/com/android/launcher3/Utilities.java
+++ b/src/com/android/launcher3/Utilities.java
@@ -608,6 +608,10 @@
                 LauncherFiles.DEVICE_PREFERENCES_KEY, Context.MODE_PRIVATE);
     }
 
+    public static boolean isWallpaperSupported(Context context) {
+        return context.getSystemService(WallpaperManager.class).isWallpaperSupported();
+    }
+
     public static boolean isWallpaperAllowed(Context context) {
         return context.getSystemService(WallpaperManager.class).isSetWallpaperAllowed();
     }