basic autofill

src/iOS.Autofill/Models/Context.cs

@@ -1,9 +1,12 @@
-using Foundation;
+using AuthenticationServices;
+using Foundation;
 
 namespace Bit.iOS.Autofill.Models
 {
     public class Context
     {
         public NSExtensionContext ExtContext { get; set; }
+        public ASCredentialServiceIdentifier[] ServiceIdentifiers { get; set; }
+        public string UrlString { get; set; }
     }
 }