Merge "Add API surface for ConnectivityDiagnostics API."
am: 33bb594563

Change-Id: I1661e0c1f73a2081ac19e6cca2b1128d4917de90
tree: 24cf7ba406cea4c49a7033b18ff8b5b62dd8b541
  1. core/
  2. services/
  3. tests/