title: Android: Action to open up VPN Settings Activity
body: <p>I have been looking around for a way to launch the VPN settings activity through my android app, but cannot find it. Note that I am targeting Android 2.2, hence will not be able to use the facilities provided in android ICS.</p>
  
  <p>What is the action that I should pass into an Intent in order to get the VPN settings screen to open up ?</p>