apps/TestingCamera2/res/xml/still_camera.xml

<?xml version="1.0" encoding="utf-8"?>

<testingcamera2_config>
  <target_panes>
    <target_pane type="id" />
  </target_panes>

  <camera_panes>
    <camera_pane camera_id="1" id="3" />
  </camera_panes>

</testingcamera2_config>