Merge "Fix multipathPolicyTracker query-update loop"

        private final NetworkTemplate mNetworkTemplate;

        private final UsageCallback mUsageCallback;

        private NetworkCapabilities mNetworkCapabilities;

        private final NetworkStatsManager mStatsManager;

        public MultipathTracker(Network network, NetworkCapabilities nc) {

            this.network = network;

                    updateMultipathBudget();

                }

            };

            mStatsManager = mContext.getSystemService(NetworkStatsManager.class);

            // Query stats from NetworkStatsService will trigger a poll by default.

            // But since MultipathPolicyTracker listens NPMS events that triggered by

            // stats updated event, and will query stats

            // after the event. A polling -> updated -> query -> polling loop will be introduced

            // if polls on open. Hence, set flag to false to prevent a polling loop.

            mStatsManager.setPollOnOpen(false);

            updateMultipathBudget();

        }

        private long getNetworkTotalBytes(long start, long end) {

            try {

                final android.app.usage.NetworkStats.Bucket ret =

                        mContext.getSystemService(NetworkStatsManager.class)

                        .querySummaryForDevice(mNetworkTemplate, start, end);

                        mStatsManager.querySummaryForDevice(mNetworkTemplate, start, end);

                return ret.getRxBytes() + ret.getTxBytes();

            } catch (RuntimeException e) {

                Log.w(TAG, "Failed to get data usage: " + e);