When the test fails, dump network_management and netpolicy
services to help in debugging.
Bug: 64274313
Test: cts-tradefed run singleCommand cts-dev -m CtsHostsideNetworkTests \
-t com.android.cts.net.HostsideRestrictBackgroundNetworkTests
Change-Id: I76287de2c7cd6f394af9768a69e2c0fabba3be25