title: Flutter: ERR_UNKOWN_URL_SCHEME when opening Facebook Messenger
body: <p>I am using <a href="https://pub.dev/packages/url_launcher" rel="nofollow noreferrer">url_launcher</a> to open Facebook chat like so:</p>
  
  <pre><code>...
  onTap: () {
    launch("https://m.me/someUser", forceWebView: true);
  },
  ...
  </code></pre>
  
  <p>On iOS works fine, however on Android I get <code>ERR_UNKNOWN_URL_SCHEME</code>.
  This is because Facebook is trying to do <code>intent://</code> in order to open the Messenger app (which I don't have it installed).</p>
  
  <p>I did find solutions for Java/Android on this issue, however don't know how would it work in Flutter/Dart.</p>