[NS B02] Split out a function to apply a NetworkReassignment

        // be optimized to only do the processing needed.

        final long now = SystemClock.elapsedRealtime();

        final NetworkAgentInfo oldDefaultNetwork = getDefaultNetwork();

        final NetworkReassignment changes = computeNetworkReassignment();

        applyNetworkReassignment(changes, oldDefaultNetwork, now);

    }

        // Now that the entire rematch is computed, update the lists of satisfied requests in

        // the network agents. This is necessary because some code later depends on this state

        // to be correct, most prominently computing the linger status.

    private void applyNetworkReassignment(@NonNull final NetworkReassignment changes,

            @Nullable final NetworkAgentInfo oldDefaultNetwork, final long now) {

        // First, update the lists of satisfied requests in the network agents. This is necessary

        // because some code later depends on this state to be correct, most prominently computing

        // the linger status.

        for (final NetworkReassignment.RequestReassignment event :

                changes.getRequestReassignments()) {

            // The rematch is seeded with an entry for each request, and requests that don't