Fix querying Ethernet availability for unprivileged callers. am: dd397f58c7 am: 4ff97e70da am: 6b41e255c6 am: 1ba2a5d379

Change-Id: If1deb6bb0050c01046aa2b3f951a0f7f518c31bc
tree: 1f5baecf83c6d219b97fa71c75676df04ff9c80e
  1. service-t/
  2. tests/