Update NPMS to notify AMS when network policy rules are updated.

Bug: 27803922
Test: runtest -c com.android.server.am.ActivityManagerInternalTest frameworks-services
      runtest -c com.android.server.NetworkPolicyManagerServiceTest frameworks-services

Change-Id: I357fd5c80b7e6d3e63df95397e328c52f233958b
7 files changed