Support refresh routing rules

Useful when VPN interface has changed.

mobile/src/main/res/menu/main.xml

@@ -1,6 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
       xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:id="@+id/reapply"
+        android:icon="@drawable/ic_navigation_refresh"
+        android:title="Reapply routing rules"
+        app:showAsAction="always"/>
     <item
         android:id="@+id/settings"
         android:icon="@drawable/ic_action_settings"