Replace ServiceAddress by libsignal_protocol::ServiceId

[gferon]

I hid a bunch of mistakes in there just to check if @rubdos is paying attention (jk, I think it should be fine).

This definitely changes some things, like in some cases when preparing protos, you would get the prefixed service_id_string for PNI (which was the raw UUID before). I'm pretty sure it didn't use to work correctly.

Thank you for reading.

[rubdos]

The strong types for Aci and Pni are awesome! Clippy has a useful suggestion too ;-)

[gferon]

I think this is ready to 🚢

Regarding your suggestions to use recipent = %recipient.service_id_string(), I'm not sure I exactly get it, because this is the impl of tracing::Value for String: https://docs.rs/tracing-core/0.1.32/src/tracing_core/field.rs.html#632 which means we don't need to call the fmt::Display wrapper one.