title: getElevation and setElevation methods
body: <p>I know that <code>ActionBar.getElevation()</code> and <code>ActionBar.setElevation(float)</code> methods were added since API 21 but I want to achieve this on API 19 too.</p>
  
  <p>Is there any way to programmatically elevate an ActionBar (z-index) without using external libraries?</p>