Encapsulate the `mail` ICE servers availability check in an overridable
function, since the hack does not work in a portal context, but Knowledge portal
users should be allowed to use the collaborative feature. Knowledge will
override the session check by always returning true, since mail is a dependency
of Knowledge and is therefore always installed with it.
Allow access to the edition channel for portal users.
task-3378266
X-original-commit: odoo/odoo@03e1148ac9
Part-of: odoo/odoo#128962
abd-msyukyu-odoo
24c3095532