Merge changes from topic "am-c2cb4c0f3ab84530991868dc5fd89fe9" into rvc-d1-dev-plus-aosp

* changes:
  [automerger skipped] Merge changes from topic "am-99b870448c8c43b2815c42861ac6235c-rvc-dev" into rvc-dev am: df554bb5 am: 13c64e59 -s ours
  [automerger skipped] [SP18.5] Create offload controller poll interval to resource am: aea13aec am: 8ad7c9cc -s ours
  [automerger skipped] [SP18.4] Add unit test for polling network stats in OffloadController am: 3f1c7556 am: a75da0fb -s ours
  [automerger skipped] [SP18.3] Adapt TestableNetworkStatsProviderCbBinder am: 38f298d4 am: f513f801 -s ours