Integration of third party maps with Android Auto Cars Library

I am integrating Android Auto Car Library for my navigation application. i have implemented navigation template successfully but stuck in integrating third party maps sdk(Like here maps, mapbox etc) as there is only an option for drawing own map rendering with canvas. Any help would highly be appreciated. Thanks.

The issue names no files, tests, or entry points beyond the Android Auto Car Library navigation template. Start by locating the navigation-template sample and checking its supported map-rendering path against the intended third-party SDK integration. Done would require a defined, working integration approach, but the issue does not specify acceptance criteria.

Written by the indexing model from the issue text.