AOT support

Author: Satwik Kumar Sharma

source/NuGet.config

@@ -7,6 +7,5 @@
   </packageSources>
   <disabledPackageSources>
     <clear />
-    <add key="AdaptiveCards-Dependencies" value="true" />
   </disabledPackageSources>
 </configuration>

source/uwp/winui3/WinUI3ObjectModelTest/ObjectModelTests.cs

@@ -1013,7 +1013,7 @@ public void OpenUrlAction()
             AdaptiveCard adaptiveCard = new AdaptiveCard();
             adaptiveCard.Actions.Add(openUrlAction);
 
-            string expectedSerialization = "{\"actions\":[{\"iconUrl\":\"http://www.stuff.com/icon.jpg\",\"id\":\"OpenUrlId\",\"isEnabled\":false,\"mode\":\"secondary\",\"style\":\"Destructive\",\"title\":\"Title\",\"tooltip\":\"I am a tooltip\",\"type\":\"Action.OpenUrl\",\"url\":\"http://www.stuff.com/\"}],\"body\":[],\"type\":\"AdaptiveCard\",\"version\":\"1.0\"}";
+            string expectedSerialization = "{\"actions\":[{\"iconUrl\":\"http://www.stuff.com/icon.jpg\",\"id\":\"OpenUrlId\",\"isEnabled\":false,\"mode\":\"secondary\",\"role\":\"Link\",\"style\":\"Destructive\",\"title\":\"Title\",\"tooltip\":\"I am a tooltip\",\"type\":\"Action.OpenUrl\",\"url\":\"http://www.stuff.com/\"}],\"body\":[],\"type\":\"AdaptiveCard\",\"version\":\"1.0\"}";
 
             var jsonString = adaptiveCard.ToJson().ToString();
             Assert.AreEqual(expectedSerialization, jsonString);