Fix querying Ethernet availability for unprivileged callers. am: bc7ff5d89f am: 6b4862dfc8 am: 4815281295

Change-Id: Iafb673e949d06a327327d2ff043d8929a35974fa
tree: 497098f83761ff7aaa565fc8e6207dd2ee411dc4
  1. service-t/
  2. tests/