[DU04-2]Appropriate changes to the NetworkPolicyManager API

Divide the NetworkPolicyManager API
notifyStatsProviderWarningOrLimitReached into the following two APIs:
1. notifyStatsProviderWarningReached()
2. notifyStatsProviderLimitReached()

Bug: 216474563
Test: atest NetworkStatsServiceTest NetworkPolicyManagerTest
            NetworkPolicyManagerServiceTest OffloadControllerTest
Change-Id: Ic413eb532b5e24d4a7e2afabdcf643ab6607b1ed
3 files changed
tree: 867a7b92da280320fc661ec5d0ea87f47fafeac6
  1. framework/
  2. framework-t/
  3. service-t/
  4. services/
  5. tests/