Update NPMS internal state when app idle parole state is changed.

Fixes: 37250313
Test: 1. cts-tradefed run singleCommand cts-dev --module CtsHostsideNetworkTests -t \
      com.android.cts.net.HostsideRestrictBackgroundNetworkTests
      2. runtest -c com.android.server.NetworkPolicyManagerServiceTest frameworks-services
Change-Id: I5fcac397116a07fe9015b7dabf5bca57b0b23176