Merge "Support query cancellation for async DNS API" am: 6aea92f594 am: 697b5a4aab
am: 7bc21f13af

Change-Id: I034361541f64c10d72474beaefdb3547c9c2733e
tree: 04de90411e3e01a430754e4f12347aba62667852
  1. core/
  2. services/
  3. tests/