It doesn't set a connection so it doesn't do anything.
DBus "connections" also aren't like Qt connections that getsevered when the sender goes away but they are match ruleson DBus so we can just keep the same interface instance.
This has been broken since some idiot who didn’t know DBus I added it and nobody really complained. So let’s drop it.
Realistically, KWin will be the owner under Wayland which will be there before PowerDevil and will restore lockscreen should it restart.
Likewise under X ksmserver should be present before PowerDevil.
I was debugging why PowerDevil sometimes didn’t realize the screen was locked and adding more complication ontop doesn’t help, so drop this.