feat: update message with app creds (#1166)

Co-authored-by: pierrick <pierrick@google.com>

chat/client-libraries/cloud/src/main/java/com/google/workspace/api/chat/samples/UpdateMessageAppCred.java

@@ -17,7 +17,13 @@
 package com.google.workspace.api.chat.samples;
 
 import com.google.protobuf.util.JsonFormat;
+
+import java.util.List;
+
 // [START chat_update_message_app_cred]
+import com.google.apps.card.v1.Card;
+import com.google.apps.card.v1.Card.CardHeader;
+import com.google.chat.v1.CardWithId;
 import com.google.chat.v1.ChatServiceClient;
 import com.google.chat.v1.UpdateMessageRequest;
 import com.google.chat.v1.Message;
@@ -33,10 +39,14 @@ public static void main(String[] args) throws Exception {
         .setMessage(Message.newBuilder()
           // replace SPACE_NAME and MESSAGE_NAME here
           .setName("spaces/SPACE_NAME/messages/MESSAGE_NAME")
-          .setText("Updated with app credential!"))
+          .setText("Text updated with app credential!")
+          .addCardsV2(CardWithId.newBuilder().setCard(Card.newBuilder()
+            .setHeader(CardHeader.newBuilder()
+              .setTitle("Card updated with app credential!")
+              .setImageUrl("https://fonts.gstatic.com/s/i/short-term/release/googlesymbols/info/default/24px.svg")))))
         .setUpdateMask(FieldMask.newBuilder()
           // The field paths to update.
-          .addPaths("text"));
+          .addAllPaths(List.of("text", "cards_v2")));
       Message response = chatServiceClient.updateMessage(request.build());
 
       System.out.println(JsonFormat.printer().print(response));