Provide a way to filter messages before they are delivered to objects

Q1, I need a way to judge whether a dbus method call is allowed. If not allowed, the call will be aborted.

spy-hook can only check before the method call, it cannot abort the method call when the check fails.

Q2, In the spy-hook, only the path of the called service can be known, and the name of the called service cannot be known. I need the service-name.

The attachment contains a demo describing the problem.

The suggested changes are as follow：

https://codereview.qt-project.org/c/qt/qtbase/+/440744