Add wallpaper default permissions

Change-Id: If43a594da31fbab9280ce45b049737f6c534b620
diff --git a/Android.bp b/Android.bp
index adff7aa..f1857a9 100644
--- a/Android.bp
+++ b/Android.bp
@@ -108,7 +108,18 @@
         "WallpaperCropper",
         "WallpaperPicker2",
     ],
-    required: ["privapp_whitelist_com.android.wallpaper"],
+    required: [
+        "default_permissions_com.android.wallpaper",
+        "privapp_whitelist_com.android.wallpaper"
+    ],
+}
+
+prebuilt_etc {
+    name: "default_permissions_com.android.wallpaper",
+    system_ext_specific: true,
+    src: "default_permissions_com.android.wallpaper.xml",
+    sub_dir: "default-permissions",
+    filename_from_src: true,
 }
 
 prebuilt_etc {