Expose `shouldHandle(ApplicationEvent)` in `ApplicationListenerMethodAdapter`

[odrotbohm]

It would be nice if ApplicationListenerMethodAdapter exposed a variant of its already existing but private shouldHandle(ApplicationEvent, Object[]) to inspect whether a listener is actually interested in an event instance. This would allow finding out whether, for example, a condition defined in @(Transactional)EventListener will ultimately cause the event instance not being handled, even though the listener might be generally interested in events of a particular type.