PlayerInput should broadcast events when currentActionMap value changes

There’s already a TODO to add events for control scheme switches:

////TODO: add event for control scheme switches

It would be nice to also have and event triggered for action map changes.

Until then Input System have some of these in code below PlayerInput, so if you want, you can use those until, if ever, Unity does make PlayerInput have those events.

You can read up on InputSystem.onActionChange here.

Thanks,
I ended up not needing it for the problem I had, but still very useful for doing stuff like changing UI based on the device being used.