How to customize android 4.2 for BananPI M1+

I am porting android to BananaPi by referring following method.

The porting done successfylly and android image is booting on BananaPI. I want to customize the android from android source. I don’t have any idea on how to customize from source. How to add/remove pacakges from android source. I want to boot basic kernel and basic android utility.

Also want to understand android source structure.

Let me know if you have any link

are you have BPI-M1 android source code ???

Hello I am using following method to build android for BananaPI M1+,_script.bin_and_linux-kernel

I have android source code.

How can I disable the parition /system. I dont want /system to mount