[tests] Use msftconnecttest.com in QuoteInvalidQuoteUrlsShouldWork (#…

…7919)

Context: 112c832
Context: https://bugzilla.xamarin.com/show_bug.cgi?id=14968
Context: xamarin/monodroid@5e923e3
Context: xamarin/monodroid@2e5f7bb

For historical purposes…

<https://bugzilla.xamarin.com/show_bug.cgi?id=14968> is (was?) a bug
wherein accessing an "invalid" URL such as
<http://example.com/?query&foo|bar> would result in a
`URISyntaxException` at runtime:

	Exception of type 'Java.Net.URISyntaxException' was thrown.
	  at Android.Runtime.JNIEnv.NewObject (IntPtr jclass, IntPtr jmethod, Android.Runtime.JValue[] parms)
	  at Java.Net.URI..ctor (System.String uri)
	  at Android.Runtime.AndroidEnvironment+_Proxy.IsBypassed (System.Uri host)
	  at System.Net.ServicePointManager.FindServicePoint (System.Uri address, IWebProxy proxy)
	  at System.Net.HttpWebRequest.GetServicePoint ()
	  at System.Net.HttpWebRequest.BeginGetResponse (System.AsyncCallback callback, System.Object state)
	  at System.Net.HttpWebRequest.GetResponse ()
	  at Xamarin.Android.RuntimeTests.ProxyTest.QuoteInvalidQuoteUrlsShouldWork ()
	  at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (System.Reflection.MonoMethod,object,object[],System.Exception&)
	  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture)
	  --- End of managed exception stack trace ---
	java.net.URISyntaxException: Illegal character in query at index 29: http://example.com/?query&foo|bar
		at libcore.net.UriCodec.validate(UriCodec.java:63)
		at java.net.URI.parseURI(URI.java:406)
		at java.net.URI.<init>(URI.java:204)
		at xamarin.android.nunitlite.TestSuiteInstrumentation.n_onStart(Native Method)
		at xamarin.android.nunitlite.TestSuiteInstrumentation.onStart(TestSuiteInstrumentation.java:39)
		at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1701)

Index 29 is `|` (zero-based!).

The "problem" here that using `|` within the query string is accepted
under .NET & Mono, which resulted in a "breakage of expectations" for
Xamarin.Android customers ("this URL works on .NET!").

The "fix" was to use [`Uri.AbsoluteUri`][5], which replaces `|` with
`%7C`, hex-escaping the offending value and adding the
`ProxyTest.QuoteInvalidQuoteUrlsShouldWork()` unit test.

That background done, commit 112c832 updated
`ProxyTest.QuoteInvalidQuoteUrlsShouldWork()` to hit
<https://bing.com/?query&foo|bar> instead of
<http://example.com/?query&foo|bar>, on the assumption that it would
be "better" if we *didn't* use non-Microsoft URLs as part of our unit
tests.

The problem is that this didn't work (eep?! not sure how PR #7909
was green here!):

	System.Net.WebException : net_http_ssl_connection_failed
	----> System.Net.Http.HttpRequestException : net_http_ssl_connection_failed
	----> System.Security.Authentication.AuthenticationException : net_auth_SSPI
	----> Interop+AndroidCrypto+SslException : Exception_WasThrown, Interop+AndroidCrypto+SslException

Update `ProxyTest.QuoteInvalidQuoteUrlsShouldWork()` to instead hit
<http://www.msftconnecttest.com/connecttest.txt?query&foo|bar>, which
is a Microsoft-owned server -- no possible DOS'ing of 
<http://example.com> -- which *passes* for this particular test.

[0]: https://developer.android.com/reference/java/net/URI#URI(java.lang.String)
[1]: https://www.ietf.org/rfc/rfc2396.txt
[2]: https://www.ietf.org/rfc/rfc3986.html#section-3.4
[3]: https://android.googlesource.com/platform/libcore/+/jb-mr2-release/luni/src/main/java/libcore/net/UriCodec.java#46
[4]: https://android.googlesource.com/platform/libcore/+/jb-mr2-release/luni/src/main/java/java/net/URI.java#349
[5]: https://learn.microsoft.com/en-us/dotnet/api/system.uri.absoluteuri?view=net-7.0

tests/Mono.Android-Tests/System.Net/ProxyTest.cs

@@ -13,7 +13,7 @@ public class ProxyTest {
 		[Test]
 		public void QuoteInvalidQuoteUrlsShouldWork ()
 		{
-			string url      = "https://bing.com/?query&foo|bar";
+			string url      = "http://www.msftconnecttest.com/connecttest.txt?query&foo|bar";
 			var request     = (HttpWebRequest) WebRequest.Create (url);
 			request.Method  = "GET";
 			var response    = (HttpWebResponse) request.GetResponse ();