title: How to set dimensions of a DraweeView to "wrap_content" in the Fresco library
body: <p>I'm using the <code>Fresco</code> library in my app to load images.
  The problem is that I can't set my images height to <code>"wrap_content"</code> because  <code>"wrap_content"</code> is not supported in the <code>Fresco</code> library.
  So how can I make my images to look good using a <code>DraweeView</code>?
  I looked here but I couldn't find a solution to this problem : <a href="http://frescolib.org/docs/wrap-content.html#_" rel="nofollow">frescolib/wrap_content</a></p>
  
  <p>For example:</p>
  
  <pre><code>&lt;com.facebook.drawee.view.SimpleDraweeView
           android:id="@+id/intro_image1"
           android:layout_width="match_parent"
           android:layout_height= // Can't use "wrap_content"
           fresco:placeholderImage="@drawable/placeholder_image" /&gt;
  </code></pre>
  
  <p>BTW the images dimensions are 730*760</p>