UbuntuTouch: fix URL dispatcher configuration

data/ubuntu-touch/lomiri_vnc.url-dispatcher

 [
   {
-    "protocol": "vnc",
+    "protocol": "vnc"
   }
 ]

lomiri-vnc.qbs

@@ -94,6 +94,7 @@ Project {
             files: [
                 "manifest.json",
                 "lomiri_vnc.apparmor",
+                "lomiri_vnc.url-dispatcher",
             ]
         }