title: How can I get the white, bi-directional loading circle?
body: <p>I've got a perfectly decent loading circle, made like so:</p>
  
  <pre><code>&lt;ProgressBar
      android:id="@+id/loading"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centerInParent="true"
      android:indeterminate="true"
      android:indeterminateOnly="true"
      style="?android:attr/progressBarStyleLarge"
      /&gt;
  </code></pre>
  
  <p>and it comes out looking like this:</p>
  
  <p><img src="https://i.stack.imgur.com/qZjzN.png" alt="enter image description here"></p>
  
  <p>What I don't know how to do is make a loading circle that looks like this:</p>
  
  <p><img src="https://i.stack.imgur.com/wDlRp.png" alt="enter image description here"></p>
  
  <p>(I'm not worried about the size, that was just the first screenshot I found)</p>
  
  <p>How is that circle usually produced? Is there an existing asset I can reference?</p>