Downlink nas transport
Support new behavior for conveying RegistrationAccept/PDUSessionEstablishmentAccept in DownlinkNasTransport/InitialContextSetupRequest (If UEContextRequest is present in UEInitialMessage)
Edited by Tien-Thinh Nguyen
Support new behavior for conveying RegistrationAccept/PDUSessionEstablishmentAccept in DownlinkNasTransport/InitialContextSetupRequest (If UEContextRequest is present in UEInitialMessage)