Extend PresenceEventListener to include presence subscription events

Description

Extend PresenceEventListener to include presence subscription events. Add #subscribedToPresence(JID subscriberJID, JID authorizerJID) and unsubscribedToPresence(JID unsubscriberJID, JID recipientJID).

This new feature was implemented by Armando as part of the GSoC project.

Environment

None
Fixed
Your pinned fields
Click on the next to a field label to start pinning.

Assignee

Gaston Dombiak

Reporter

Gaston Dombiak