Today I learned that another French company iodé was able to integrate Android Auto in their operating system iodéOS.
Moreover, I learned that Magic Earth is no longer available for free. It appears that it’s now a paid app and it seems that it never will become open source.
as for AA: it’s what sn-00-x worked out initially in a module, using stubs. All “freeer” roms use that approach. /e/OS and iodé in the same way, Calyx wrapped it up slightly different, but same idea at the core.