fix(app-emuilation/docker): Type=forking on service

In the previous commit we are forking out the docker process. We need to
set the type to forking.
feat(cros-kernel): add MASQ config

add masq feature to the kernel for networking
fix(app-emulation): fixup dirs and deps

- add dep on iproute2 utility
- create the /var/lib/ dirs for the var_overlayc