Yap butI have a steering wheel remote control with canbus and I installed another remote control connected to the Key 1 wire. where I have connected the appSwitcher.Even if the icon doesn't appear it's great 0127 is working. Unfortunately I don't have a CAN box in place so I can not test by myself.
If the screen is similar to the well known SWC learning screen you need to clear the current assignments first. Nevertheless the idea this could work with CAN is based only on the name of the screen (CanCarInfoSub3Activity).
Another change could be to disable the standard functionality of the SWC mode button. This would allow to keep the menu icons setting, have a working radio app and use AppSwitcher to switch between apps. Are you interested in testing?