One approach would be to define an ABI-like interface above the kernel layer which all Android userlands would adhere to. It would specify the functions for lib

One approach would be to define an ABI-like interface above the kernel layer which all Android userlands would adhere to. It would specify the functions for libraries like libhardware and libstagefright, as well as the GLES or Vulkan extensions needed to be supported. Google would takeover software updates against this certified base, with the OEM providing the base system for their hardware.