Merge "Add API surface for ConnectivityDiagnostics API." am: 33bb594563 am: 30f5bec382

Change-Id: I762ac90f485af3c31afadb249f28363f5a34713f
tree: 24cf7ba406cea4c49a7033b18ff8b5b62dd8b541
  1. core/
  2. services/
  3. tests/