Mavic (and most other DJI drones) cannot take a companion computer. These will be integrated with the FlytBase Cloud platform using an Android/iOS app. This will allow the developers build the business logic (or, integrate with existing business apps) in the cloud, and make it work with their DJI drones (or hybrid fleet of drones – DJI / non-DJI).
Hope that answers your question. Let me know if you have any other queries.