title: layoutopt is missing
body: <p>I knew layoutopt tools through the dev guide,but I can't find layoutopt tools in sdk tools directory.what's wrong? I use sdk manage to update all version of the tools.<img src="https://i.stack.imgur.com/1mXKB.jpg" alt="enter image description here"></p>
  
  <p><img src="https://i.stack.imgur.com/l40mV.jpg" alt="enter image description here"></p>