title: Where is Private resources like icons in Android studio?
body: <p>i was trying to add search icon in actionbar and it's had a problem which is you can see that in below:</p>
  
  <p><strong><a href="https://stackoverflow.com/questions/32904042/how-to-add-actionbar-white-icon-in-android">How to add actionbar white icon in android</a></strong></p>
  
  <p>So, the problem <strong>was in the android studio</strong> and i'm using <code>android:icon="@drawable/abc_ic_search_api_mtrl_alpha"</code> </p>
  
  <p>BUT, I can't find anything about this name in <code>Sdk/platforms/res</code> So, for any icons in actionbar, i need to these icons name for adding it in my app.</p>
  
  <p>Where should these <strong>files/material icons</strong> can be ?</p>