Add rules to policy.json for the QoS API

Change-Id: I4ff238bf8c0cd41ad331e5727fa876ea64c32061
Fix for IPv6 RA advertisements

Change to ACCEPT, so it immediately gets passed through. I think
the RETURN statement ends up hitting the default DROP rule.

Change-Id: I517c66a470296141c0024a64e39b6d40b0c0d581