Android Things- Raspberry Pi

Migrate and build a driver for RTL8723BU (WiFi + BT USB Dongle) for Android Things 1.0.2 running over Raspberry Pi CM3 Lite We design a new hardware based on Raspberry Pi CML3 device the new hardware doesn’t have the WiFi / Bluetooth chipset, Raspberry Pi 3 have BCM43438 and the Android Things works with this but this chipset works by SPI and we need a WiFi + Bluetooth by USB. We modify the DTS to disable the current WiFi adapter by SPI, we need add the drivers to de OS to support a new one by USB. The current hardware based on Raspberry Pi CM3L are working well, we need add drivers and hardware for USB WiFi/Bluetooth (RTL8723BU) and in a near future, we need to add USB GSM/GPS If anybody can create drivers for above requirements it will be great. Kindly message me with your portfolio.