Fix querying Ethernet availability for unprivileged callers. am: dd397f58c7 am: 4ff97e70da

Change-Id: I125e0f6c3ed7005cba55cefc0872d55262fcd596
tree: 1f5baecf83c6d219b97fa71c75676df04ff9c80e
  1. service-t/
  2. tests/