title: How to get the size of available and allocated memory in a Flutter Android production app?
body: <p>I'd like to get the following info in a (production, not debug or test) Flutter Android app:</p>
  
  <ul>
  <li>number of allocated memory objects</li>
  <li>allocated memory</li>
  <li>free memory</li>
  </ul>
  
  <p>How do I do that?</p>