Monitoring: regenerate VPCSC tests to include NotificationChannelService and UptimeCheckService. (#7853)
Monitoring: regenerate VPCSC tests to include NotificationChannelService and UptimeCheckService. (#7853)

* Regenerate tests to include NotificationChannelService.

* Add UptimeCheck service.

tseaver/google-cloud-python,googleapis/google-cloud-python,tseaver/google-cloud-python,GoogleCloudPlatform/gcloud-python,tswast/google-cloud-python,googleapis/google-cloud-python,GoogleCloudPlatform/gcloud-python,tseaver/google-cloud-python,tswast/google-cloud-python,tswast/google-cloud-python