Ping service should allow exposing multiple rangefinders over mavlink

[Williangalvani]

we will need to allow the user to pick the orientation, and that should be all it takes.

[ES-Alexander]

A relevant context comment.

We probably also want to allow the user to change the ID through the UI (relevant to #2187), even if that technically isn't required for it to work (it's good manners not to have separate devices with the same ID).