Run testRegisterServiceInfoCallback on test iface

Some wifi interfaces on some devices do not have all the flags
necessary to test mdns on some devices; for example only having
IFF_BROADCAST, and not IFF_MULTICAST. Avoid failing on some devices by
using the test network, which should also be more stable.

Bug: 268138840
Test: atest
Change-Id: Iacbaf0c4293e17a45319e063f944a891e81b4b29
1 file changed