title: I want to add Face contour in expo-face-detector
body: <p>expo-face-detection currently supports only landmarks</p>
  <p>This is my code:</p>
  <pre><code>List&lt;PointF&gt; lowerLipUpperContour = face.getContour(FaceContour.LOWER_LIP_TOP).getPoints();
  List&lt;PointF&gt; upperLipLowerContour = face.getContour(FaceContour.UPPER_LIP_BOTTOM).getPoints();
  
  Bundle points = new Bundle(2);
  points.putDouble(&quot;x&quot;, lowerLipUpperContour.get(5).getX());
  points.putDouble(&quot;y&quot;, lowerLipUpperContour.get(5).getY());
  encodedFace.putBundle(&quot;lowerLipUpperContour&quot;,points);
  </code></pre>
  <p>But after running i get the following error :</p>
  <pre><code> error: cannot find symbol
      points.putDouble(&quot;x&quot;, lowerLipUpperContour.get(5).getX());
  </code></pre>