ROS2 on AGX Xavier

[dusty_nv]

@michael.zill

I’ve also seen that the next release of ROS2 Foxy Fitzroy is targeting Ubuntu 20.04. L4T R32.4.2 is based on Ubuntu 18.04

FYI, here is a Dockerfile for building ROS2 Foxy on L4T R32.4 (Ubuntu 18.04):

https://github.com/dusty-nv/jetson-containers/blob/master/Dockerfile.ros.foxy