I have some experience about internet of things and MCU programming. I wanted to know to build a product like mirror or tonal or something like them. Android TV or Car monitor. What operating system is used? I guess all of them using kind of android/Linux but how can they develop it for own hardware ? Recently I have read about Android of things and I understand that it supports a number of specific hardware like Raspberry Pi 3. If I want to create a product like these products, what should I know about the developing operating system and its prerequisites?
It is a good idea to introduce a resource or book about all process. Thanks a lot