title: What is "platformBuildVersionCode" in AndroidManifest.xml?
body: <p>For what reason <code>platformBuildVersionCode</code> and <code>platformBuildVersionName</code> are mentioned in Android Manifest file? Already <code>android:versionCode</code> and <code>android:versionName</code> also mentioned.</p>
  
  <pre><code>android:versionCode="8762015"android:versionName="0.3.6" package="com.android.app"
  platformBuildVersionCode="19" platformBuildVersionName="4.4.2"
  </code></pre>
  
  <p>I need reason for mentioning that.</p>