Add content filter topic feature empty stub (ros2#289)

Signed-off-by: Chen.Lihui <lihui.chen@sony.com>

Author: Chen Lihui

rmw_cyclonedds_cpp/src/rmw_node.cpp

@@ -2869,6 +2869,7 @@ static rmw_subscription_t * create_subscription(
   memcpy(const_cast<char *>(rmw_subscription->topic_name), topic_name, strlen(topic_name) + 1);
   rmw_subscription->options = *subscription_options;
   rmw_subscription->can_loan_messages = sub->is_loaning_available;
+  rmw_subscription->is_cft_enabled = false;
 
   cleanup_subscription.cancel();
   cleanup_rmw_subscription.cancel();
@@ -2994,6 +2995,30 @@ extern "C" rmw_ret_t rmw_subscription_get_actual_qos(
   return RMW_RET_ERROR;
 }
 
+extern "C" rmw_ret_t rmw_subscription_set_content_filter(
+  rmw_subscription_t * subscription,
+  const rmw_subscription_content_filter_options_t * options)
+{
+  static_cast<void>(subscription);
+  static_cast<void>(options);
+
+  RMW_SET_ERROR_MSG("rmw_subscription_set_content_filter: unimplemented");
+  return RMW_RET_UNSUPPORTED;
+}
+
+extern "C" rmw_ret_t rmw_subscription_get_content_filter(
+  const rmw_subscription_t * subscription,
+  rcutils_allocator_t * allocator,
+  rmw_subscription_content_filter_options_t * options)
+{
+  static_cast<void>(subscription);
+  static_cast<void>(allocator);
+  static_cast<void>(options);
+
+  RMW_SET_ERROR_MSG("rmw_subscription_get_content_filter: unimplemented");
+  return RMW_RET_UNSUPPORTED;
+}
+
 static rmw_ret_t destroy_subscription(rmw_subscription_t * subscription)
 {
   rmw_ret_t ret = RMW_RET_OK;