XEP-0384: OMEMO Encryption

[Neustradamus]

Dear @lhost,

Can you add the XEP-0384: OMEMO Encryption support?

• https://xmpp.org/extensions/xep-0384.html

XEP-0454: OMEMO Media sharing:

• https://xmpp.org/extensions/xep-0454.html

XEP-0396: Jingle Encrypted Transports - OMEMO
https://xmpp.org/extensions/xep-0396.html