improve APF offload dump

Currently we claim:
    ApfConfig: { mcast: DROP, offloads: [ ARP, ND, MLD, Ping6, ] RAs: 2 mDNSs: 0 }

on ipv6-only GoogleGuest, even though without ipv4 address we won't actually enable ARP offload

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I797cb032e4876377f1acf7ca815b277d41b551ed
1 file changed