DO NOT MERGE: Move PinningNetworkCallback out to a new NetworkPinner class.

Cherry-picked from 4b0c762011d5c1d720c729e76487a31008965d6f

Bug: 19159232
Change-Id: Ic366b53259ee5944a8e864876425a6558c0a7216
1 file changed
tree: 5c00eab6fa7477f24d8f2b1994840be1e72ef86d
  1. core/
  2. services/
  3. tests/