AIC-manager is not the another container but the manager of AIC (Android in container) image. Can you give more details about the green color issue?
The reason why we choose the docker is because it is very popular but Android image of CIC also could run into other run-c containers like LXC/LXD. Any specific reason or usage case you want to use LXC/LXD? If yes, we do consider to add it into our support.