message: Actually create the ExternalCommitHelper
diff: @@ -193,7 +193,7 @@ std::shared_ptr<Realm> RealmCoordinator::get_realm(Realm::Config config)
  config.schema = {};
  realm = Realm::make_shared_realm(std::move(config), shared_from_this());
  - if (!m_notifier && m_config.immutable() && m_config.automatic_change_notifications) {
  + if (!m_notifier && !m_config.immutable() && m_config.automatic_change_notifications) {
  try {
  m_notifier = std::make_unique<ExternalCommitHelper>(*this);
  }
  