Move NetworkState to Connectivity

NetworkState is becoming an internal implementation class, with
NetworkStateSnapshot replacing it as a proper API. Considering this it
belongs inside Connectivity.

Bug: 174123988
Test: m
Change-Id: I201f1a07c50d9da31e33f5c207875da8863ef57c
1 file changed
tree: 11f031b124481573853ea52859d3efe3c6387270
  1. core/
  2. framework/
  3. service/
  4. services/
  5. tests/
  6. OWNERS