Hello sir. Hope you are doing well.
I have enough experience in customization of android firmware. I have developed android firmware long time.
Android version: 4.0.4 - 8.1
SoC: Allwinner, MediaTek, Rockchip, AMLogic
Range: kernel, android framework, system app such as settings and systemui, normal apps
I can do it successfully.
Best regards, Thanks.