[next] Remove dbus-glib GTypes from public API: properties and handwritten signals

Submitted by Simon McVittie

Assigned to Simon McVittie

Link to original bug (#77187)

Description

+++ This bug was initially created as a clone of Bug #76369 +++

We should make sure that dbus-glib isn't exposed in our high-level API. I see for example TpCallStreamEndpoint:remote-credentials property which is of type TP_STRUCT_TYPE_STREAM_CREDENTIALS.

Version: git master

Depends on

• Bug 77144

Blocking

• Bug 68661
• Bug 76369