[6.x] Fixed shouldQueue() check for bound event listeners

[MasterRO94]

Problem
We have an Event Listener that implements the ShouldQueue interface.
Laravel provides a perfect way to handle should handler be queued or not with shouldQueue method.

If the listener has shouldQueue method and it returns false handler won't be queued.
But if we bind Listener via Service container and implement shouldQueue in the child class shouldQueue method won't be triggered if parent class doesn't have shouldQueue method.

This PR fixes this issue by creating an instance before method_exists check.