title: Set a random Geofence location 2km away based off a users current location
body: <p>I'm using using Google-Play-Services-Location to track the location of the user.</p>
  
  <p>When the user clicks a button it will start a challenge and the user would need to go to a random location within 2km of their current longitude and latitude (computed randomly by the application logic).</p>
  
  <p>Geofencing that location to determine if they arrived.</p>
  
  <p>Is it possible to set a geofence in this way, and how would I go about attempting it?</p>