Merge "Addressing API council comments on NetworkStatsManager." into nyc-dev
am: dc5f558640

* commit 'dc5f558640da8785fabc274167ec37a0fda30cd6':
  Addressing API council comments on NetworkStatsManager.

Change-Id: I952e69e7cfbd8cebcbac7c3b19ede300e26777e8