Introduce a way to control if a whole stream event application is enabled/disabled by default

Currently, events are enabled by default, but you might want to introduce a new set of types of events (an application) which is not supposed to be watched by default (very technical type of events, etc.).

It seems to be possible to control that for a specific type of event through RecordableEventDescriptor but there is nothing at application level. One possibility could be to introduce the concept of default RecordableEventDescriptor for the events of an application (which some specific hint format on RecordableEventDescriptor for example).