Adding non empty check to ExtensionResult and ExtensionActionResponse

libraries/bot-schema/src/main/java/com/microsoft/bot/schema/teams/MessagingExtensionActionResponse.java

@@ -3,13 +3,15 @@
 
 package com.microsoft.bot.schema.teams;
 
+import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
 /**
  * Response of messaging extension action.
  */
 public class MessagingExtensionActionResponse {
     @JsonProperty(value = "task")
+    @JsonInclude(JsonInclude.Include.NON_EMPTY)
     private TaskModuleResponseBase task;
 
     @JsonProperty(value = "composeExtension")

libraries/bot-schema/src/main/java/com/microsoft/bot/schema/teams/MessagingExtensionResult.java

@@ -25,12 +25,15 @@ public class MessagingExtensionResult {
     private List<MessagingExtensionAttachment> attachments;
 
     @JsonProperty(value = "suggestedActions")
+    @JsonInclude(JsonInclude.Include.NON_EMPTY)
     private MessagingExtensionSuggestedAction suggestedActions;
 
     @JsonProperty(value = "text")
+    @JsonInclude(JsonInclude.Include.NON_EMPTY)
     private String text;
 
     @JsonProperty(value = "activityPreview")
+    @JsonInclude(JsonInclude.Include.NON_EMPTY)
     private Activity activityPreview;
 
     /**