Yep, smithy is right, the Continental "bit" is essentially algorithms within the software which interpret and act on data received from the sensors. It was the techy bods at Continental that worked on at that. BMW liked what they developed and paid them (sorry worked with them...) for the software. Don't get mixed up with hardware and software though.
However, don't forget, this info is old (from 2014/15), so I've no idea if it's changed since then? These software systems are seemless, so in reality no one would really notice. It all seems to be BMW branded these days so maybe BMW bought the rights to it for use on their products? Or maybe they have since switched to an updated Bosch system, I really don't know?