title: Hide exit and settings button for Google Cardboard Unity
body: <p>We are using Unity to build a 360 video player which works on newer phones. We are experiencing a problem when building to older phones where we can see the exit and settings button in the top right and left corners. I am unable to find where GVR is calling the function to draw these buttons in order to disable to call. </p>
  
  <p>Any help would be appreciated.</p>