Crash when open URL Scheme

[Robin-JW]

Hi, when html code want to open URL Scheme, App will crash in FlutterWeb at line 95.

fix it like: (https://stackoverflow.com/questions/43980740/open-url-in-intent)[https://stackoverflow.com/questions/43980740/open-url-in-intent]

try {
    Intent intent = new Intent(Intent.ACTION_VIEW);
    intent.setData(Uri.parse(url));
    registrar.activity().startActivity(intent);
} catch (Exception e) {
    e.printStackTrace();
}