Add wallpaper suggestion if one isn't set.

Change-Id: I81380323f0d4f5af842a81028a763219958833bc

src/com/android/settings/SettingsActivity.java

@@ -314,6 +314,7 @@ public class SettingsActivity extends SettingsDrawerActivity
             DrawOverlayDetails.class.getName(),
             WriteSettingsDetails.class.getName(),
             ManageDefaultApps.class.getName(),
+            WallpaperTypeSettings.class.getName(),
     };