Cleaning up NetworkStatsManager.

- Throwing SecurityExceptionand and IllegalArgumentException instead of null for new APIs
- removing @removed APIs

Bug:27530098,27379882
Change-Id: Ifbe65bfc5051aa33aff2baa22cfa8e67b0f7c358
2 files changed
tree: 8ec4bc3109e400281e38e56d86ce8ade3747da95
  1. core/
  2. services/
  3. wifi/