title: Android's webview.postUrl in Flutter
body: <p>Is there a webview plugin that allows to post params to a webpage, equivalent to Android's webview.postUrl ?</p>
  
  <p>I want to post parameters in a request body in flutter and that redirects to another webpage which I need to display. I am not able to find any current webview plugin that can do this. Is there a workaround for this? </p>