Relative URLs always fail to match on Xamarin Android

[richardszalay]

var handler = new MockHttpMessageHandler();
handler.When("/local").Respond(HttpStatusCode.OK);

var client = new HttpClient(handler);
var result = client.GetAsync("http://localhost/local").Result;
result.EnsureSuccessStatusCode();

[richardszalay]

It appears that, on Xamarin Android, Uri.TryParse will add a file:// scheme to a relative Uri. This behavior also affects Uri.IsWellFormedUriString