Merge changes from topics "nem-low-prio-state", "nem-group-manager", "nem-remote-input-manager", "nem-media-manager", "nem-perform-remove", "nem-combine-remove-callbacks", "nem-callback-to-listener", "nem-alert-handling-listeners"
* changes:
Moves minimization change handling into NotificationEntryListeners.
Removes dependency of NotificationEntryManager on NotificationGroupManager.
Makes NotificationRemoteInputManager a NotificationEntryListener.
Removes circular dependency between NotificationMediaManager and NotificationEntryManager.
Combines NotificationEntryManager listener interfaces (part 5).
Combines NotificationEntryManager listener interfaces (part 4).
Combines NotificationEntryManager listener interfaces (part 3).
Combines NotificationEntryManager listener interfaces (part 2).