Some networks may have null ifaces, I guess?

Seems like a bug further upstream, but guard ourselves against it
for now.

Bug: 17033841
Change-Id: Id0e5895c3389b63d4e34b1fb064efef8b72cd609
1 file changed
tree: 76e32f86cf90d034c2fca7c3811866992867382f
  1. core/
  2. services/
  3. wifi/