You can either decrease or increase the Android Auto screen DPI. It should help you get two apps on the screen and move the icons to the bottom.
To do that, exit Android Auto and go back to GROM. In the Android Auto plugin settings of VLite, you should see the DPI settings. Increase or decrease them slightly, and give it a try!
In the Android Auto settings described above. Exit the Android Auto back to VLite and you will land in the Android Auto settings. There you can adjust the DPI and it will bring the buttons on the bottom.