[Xamarin.Android.Tools.AndroidSdk] Add API-34 to KnownVersions (#212)

Author: tondat

src/Xamarin.Android.Tools.AndroidSdk/AndroidVersions.cs

@@ -191,6 +191,9 @@ static bool MatchesId (AndroidVersion version, string id)
 newAndroidVersion(33,"13.0"){
 AlternateIds=new[]{"T"},
 },
+newAndroidVersion(34,"14.0"){
+AlternateIds=new[]{"U","UpsideDownCake","Upside Down Cake"},
+},
 };
 }
 }