omni: Whitelist OmniControl

Change-Id: I6f71c90fac3c3bbc7cee6218eac57210bdda0593
diff --git a/prebuilt/etc/permissions/privapp-permissions-omni.xml b/prebuilt/etc/permissions/privapp-permissions-omni.xml
index 96460fe..b08b822 100644
--- a/prebuilt/etc/permissions/privapp-permissions-omni.xml
+++ b/prebuilt/etc/permissions/privapp-permissions-omni.xml
@@ -79,4 +79,8 @@
         <permission name="android.permission.SET_WALLPAPER_COMPONENT"/>
         <permission name="android.permission.CHANGE_OVERLAY_PACKAGES"/>
     </privapp-permissions>
+
+    <privapp-permissions package="org.omnirom.control">
+        <permission name="android.permission.WRITE_SECURE_SETTINGS"/>
+    </privapp-permissions>
 </permissions>