xmpp: Add missing OOB type registration
Review Request #1904 — Created Oct. 7, 2022 and submitted
This was not called by anything, and presumably meant to be just like the SI one.
Compiled, and started with an XMPP account.
| Summary | ID |
|---|---|
| 1cb02525f31fd40d31c230f28d6dfd701e8e2b03 |
