can_change_contact_list
Description:
If true, presence subscription and publication can be changed using the RequestSubscription, AuthorizePublication and RemoveContacts methods.
Rational: link-local XMPP, presence is implicitly published to everyone in the local subnet, so the user cannot control their presence publication.
For this property to be valid, you must first call
prepare_async with the feature TP_CONNECTION_FEATURE_CONTACT_LIST_PROPERTIES
or TP_CONNECTION_FEATURE_CONTACT_LIST
.