TC/TM payloads - layered CHOICEs

[hcorg]

APID-based, then Service-Type based then Service-Subtype based

[maxime-esa]

Check https://taste.tuxfamily.org/wiki/index.php?title=Technical_topic:_Hints_to_model_complex_packet_encodings_with_ASN.1_and_ACN for the Type/Subtype layout