Merge "Replace Handler with Executor for async DNS API" am: 44bd665c9e
am: b856fc1410

Change-Id: I40ce45d039e01f831b6f4f50ed360a2a206a1146
tree: d3ff74eb67f97d84afddfc910e3215c1223482f9
  1. core/
  2. services/
  3. tests/