title: Resize drawable in layer-list item
body: <p>I have this:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;layer-list xmlns:android="http://schemas.android.com/apk/res/android"&gt;
      &lt;item&gt;
          &lt;shape xmlns:android="http://schemas.android.com/apk/res/android"
              android:shape="oval"&gt;
  
              &lt;solid android:color="#000000"/&gt;
              &lt;size android:width="70dp" android:height="70dp"/&gt;
          &lt;/shape&gt;
      &lt;/item&gt;
  
      &lt;item android:drawable="@drawable/ic_person_white_48dp"
          android:adjustViewBounds="true"
          android:scaleType="fitXY"
          android:layout_width="10dp"
          android:layout_height="10dp"
          /&gt;
  &lt;/layer-list&gt;
  </code></pre>
  
  <p>How can I resize the <code>drawable</code> image? Currently, it's too big for the shape.</p>