title: How to disable system touch event flutter
body: <p>i'm developing smartphone lock flutter app.</p>
  <p>i want disable system touch event. ex) event that slide top to bottom at top of screen..</p>
  <p>i tried to</p>
  <pre><code>SystemChrome.setEnabledSystemUIMode(SystemUiMode.manual, overlays: []);
  </code></pre>
  <p>but, code worked only as hiding system button.</p>
  <p>how to disable system touch event?</p>