[FUI09] Expose NetworkStateSnapshot as system API

This is needed by NetworkStatsService and
NetworkPolicyManagerService to utilize the snapshots of
information of networks that grabbed from ConnectivityService.

Test: atest FrameworksNetTests NetworkPolicyManagerServiceTest
Bug: 174123988
Change-Id: I7e974ef7b23ba9ba6ee775eed9899b0c0e2eca55
2 files changed
tree: 45950d2e9013eb71b97c576cde4722b454bc7f9f
  1. core/
  2. services/