How to add, update, and remove pinned shortcuts as a Device Owner without user interaction?

There currently no API to do this silently, however this is something you might be able to achieve with a custom launcher for example.

Or you could "force" the user to do this during device provisioning with an app installed and launched as a "Required for Setup" so user won't have a choice than to go trough your app to finsih the devce setup.