Merge "Add nullability annotations to public methods of ConnManager."
am: 805e2ad9db

Change-Id: I8f5cc35869b4b76404190709206cccd895a1d4b4
tree: d3c84c9633aa9eb832ef2ec5056dea94af8d2ffc
  1. core/
  2. services/
  3. tests/