Convert inboundServices to an enum. (#3820) (#6956)
Convert inboundServices to an enum. (#3820) (#6956)

Signed-off-by: Modular Magician <86ce7da8ad74b1c583667a2bebd347455fa06219@google.com>
hashicorp/terraform-provider-google,hashicorp/terraform-provider-google,hashicorp/terraform-provider-google,hashicorp/terraform-provider-google