title: Is there an AppCompat equivalent of Widget.Material.Spinner.Underlined?
body: <p>Is it possible to get the equivalent style of Widget.Material.Spinner.Underlined using the AppCompat libraries for pre v21 devices?  </p>
  
  <p>I want to support v16+ in my app, but would really like to get the underline effect on Spinners using the AppCompat libraries if possible.  </p>