Olm had two methods:
- create_inbound (only pre-key message)
- create_inbound_from (pre-key message and identity key)
Vodozemac supports only one version, with an identity key, so we need to deprecate create_inbound.
The only tricky part is handling of INITIAL_NOTIFICATIONS_ENCRYPTED_MESSAGE, but looking at the code, it should always happen after handling SIGNED_IDENTITY_KEYS_BLOB, so it should work.