Removing a lot of nested classes
Cleaned up code

- removed unsed using statements
- removed nested classes
- tried to based on
https://github.com/xamarin/monodroid-samples/blob/master/WebViewJavaScriptInterface/WebViewJavaScriptInterface/JavaScriptInterfaceActivity.cs
make the token string a Java.Lang.String (did not help)
- renamed a private field
Trying to provoke js console log
Trying to wire up the webview

Now it is actually somewhat wired up, the method getToken is being
called.