[MS58] Expose Apis which will be used by data migration utility

This includes:
1. NetworkIdentity
2. NetworkIdentitySet
3. NetworkStatsHistory

NetworkStatsCollection Apis will be exposed in a separate CL.

Test: TH
Bug: 204830222
Change-Id: I47b2d3ac3b86cb4e6879afaae34326ca3c050ffa
4 files changed
tree: ba6f4870cdc6ca441f2f68a4f3e7308069603d93
  1. core/
  2. framework/
  3. framework-t/
  4. service-t/
  5. services/
  6. tests/