fix external build
fix external build

PiperOrigin-RevId: 298749586
Change-Id: Icc94388225c1398ddc1fd1eb0570e16af19fc886

GoogleCloudPlatform/healthcare-federated-access-services,GoogleCloudPlatform/healthcare-federated-access-services,GoogleCloudPlatform/healthcare-federated-access-services,GoogleCloudPlatform/healthcare-federated-access-services