Merge "API council feedbacks for DnsResolver" am: 65dc1155ff
am: dca57c2e44

Change-Id: Id731f73f25f437df94f936e9a3ec227b797b6031
tree: 6c61bb3e418d9ac98040f060289202aaeb0e8e8e
  1. core/
  2. services/
  3. tests/