Merge changes I35ed84fc,Ie6cfd77b,I4e4f929f,I751526e8

* changes:
  Fix comments left on aosp/1547454 and aosp/1556106
  Remove INetworkManagementService from ConnectivityService
  Remove unused INetworkManagementService
  Remove BaseNetworkObserver from Nat464Xlat
tree: 7656fcc7ab5c2b8e8bd6d2f9bb8dac1a1f499adc
  1. core/
  2. framework/
  3. service/
  4. services/
  5. tests/
  6. OWNERS