From the top of my head, this may work:
If your S3 supports screen casting, you can [edit: mirror] your screen to an HDMI output using the Chromecast. If not, the newer android phones will support this feature.
Your Journey has to have the Lockpick which allows you to enable external video input. Plug the Chromecast into the Lockpick using some sort of HDMI to RCA adapter.
But I don't know how well the resolution will translate between the two devices.
And another problem is you can't control the touch input through the uConnect screen.