title: Getting package com.google.android.gms.ads.identifier does not exist, while try to get google advertising id
body: <p>I am fetching Google advertising id in my application, I have updated my android studio and android SDK.</p>
  
  <pre><code>minSdkVersion 15
  targetSdkVersion 27
  Current gradle version is : 3.1.3
  Google services is : 3.0.0
  Google Play Services Version : 11.8.0
  android Support Libraries Version : 27.1.1
  </code></pre>
  
  <p>While fetching GAID, I am getting following error</p>
  
  <blockquote>
    <p>error: package com.google.android.gms.ads.identifier does not exist</p>
  </blockquote>
  
  <p>Not able to find <strong>AdvertisingIdClient</strong> class.</p>
  
  <p>I am bit stuck here, Please help me. 
  Thank you.</p>