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: ec401fbe3618fe2f964322c63d6674eb01e78bbc
  1. framework/
  2. service/
  3. OWNERS