radv implements the Android Vulkan HAL interface, this patch adds
Android.mk building rules by porting of radv automake rules.
vendor HAL module is installed as /vendor/lib/hw/vulkan.radv.so
Signed-off-by: Mauro Rossi <issor.oruam@gmail.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
