title: Should I get device ID for Admob when i publish my add
body: <pre><code>AdRequest adRequest = new AdRequest.Builder()
  addTestDevice(AdRequest.DEVICE_ID_EMULATOR)
  addTestDevice("HASH_DEVICE_ID")
  build();
  </code></pre>
  
  <p>I just use my device ID or How can i remove test mode and use the Correct mode </p>
  
  <p>-How can I change it ?</p>