Have the DataConnectionStat started from BSS

ConnectivityService is going to becoming a mainline module.
The DataConnectionStat is used to listen the telephony status
change and report to BSS. This does not really relate to
connectivity. DataConnectionStat was created in
ConnectivityService and use some hidden APIs which is not
allowed for a mainline module. Thus, move the creation and
monitor to BSS directly which is more appropriate place from
its functional perspective.

Also, move the DataConnectionStat out from module scope since
it does have too much relationship with connectivity module.

Bug: 171183530
Test: m ; verify the behavior with cellular state change
Change-Id: I0c2c1b90df7a107ee75e81fd49d39d65678204c0
Merged-In: I0c2c1b90df7a107ee75e81fd49d39d65678204c0

services/core/Android.bp

@@ -200,7 +200,6 @@ filegroup {
         "java/com/android/server/TestNetworkService.java",
         "java/com/android/server/connectivity/AutodestructReference.java",
         "java/com/android/server/connectivity/ConnectivityConstants.java",
-        "java/com/android/server/connectivity/DataConnectionStats.java",
         "java/com/android/server/connectivity/DnsManager.java",
         "java/com/android/server/connectivity/KeepaliveTracker.java",
         "java/com/android/server/connectivity/LingerMonitor.java",

services/core/java/com/android/server/ConnectivityService.java

@@ -203,7 +203,6 @@ import com.android.net.module.util.LinkPropertiesUtils.CompareResult;
 import com.android.net.module.util.PermissionUtils;
 import com.android.server.am.BatteryStatsService;
 import com.android.server.connectivity.AutodestructReference;
-import com.android.server.connectivity.DataConnectionStats;
 import com.android.server.connectivity.DnsManager;
 import com.android.server.connectivity.DnsManager.PrivateDnsValidationUpdate;
 import com.android.server.connectivity.KeepaliveTracker;
@@ -1213,9 +1212,6 @@ public class ConnectivityService extends IConnectivityManager.Stub
         mSettingsObserver = new SettingsObserver(mContext, mHandler);
         registerSettingsCallbacks();
 
-        final DataConnectionStats dataConnectionStats = new DataConnectionStats(mContext, mHandler);
-        dataConnectionStats.startMonitoring();
-
         mKeepaliveTracker = new KeepaliveTracker(mContext, mHandler);
         mNotifier = new NetworkNotificationManager(mContext, mTelephonyManager);
         mQosCallbackTracker = new QosCallbackTracker(mHandler, mNetworkRequestCounter);

services/core/java/com/android/server/am/BatteryStatsService.java

@@ -27,6 +27,7 @@ import android.os.BatteryStats;
 import android.os.BatteryStatsInternal;
 import android.os.Binder;
 import android.os.Handler;
+import android.os.HandlerThread;
 import android.os.IBinder;
 import android.os.INetworkManagementService;
 import android.os.Parcel;
@@ -67,6 +68,7 @@ import com.android.internal.util.DumpUtils;
 import com.android.internal.util.FrameworkStatsLog;
 import com.android.internal.util.ParseUtils;
 import com.android.server.LocalServices;
+import com.android.server.connectivity.DataConnectionStats;
 import com.android.server.net.BaseNetworkObserver;
 
 import java.io.File;
@@ -113,6 +115,8 @@ public final class BatteryStatsService extends IBatteryStats.Stub
     private ByteBuffer mUtf8BufferStat = ByteBuffer.allocateDirect(MAX_LOW_POWER_STATS_SIZE);
     private CharBuffer mUtf16BufferStat = CharBuffer.allocate(MAX_LOW_POWER_STATS_SIZE);
     private static final int MAX_LOW_POWER_STATS_SIZE = 4096;
+    private final HandlerThread mHandlerThread;
+    private final Handler mHandler;
 
     @GuardedBy("mStats")
     private int mLastPowerStateFromRadio = DataConnectionRealTimeInfo.DC_POWER_STATE_LOW;
@@ -227,6 +231,10 @@ public final class BatteryStatsService extends IBatteryStats.Stub
                 return (umi != null) ? umi.getUserIds() : null;
             }
         };
+        mHandlerThread = new HandlerThread("batterystats-handler");
+        mHandlerThread.start();
+        mHandler = new Handler(mHandlerThread.getLooper());
+
         mStats = new BatteryStatsImpl(systemDir, handler, this,
                 this, mUserManagerUserInfoProvider);
         mWorker = new BatteryExternalStatsWorker(context, mStats);
@@ -250,6 +258,9 @@ public final class BatteryStatsService extends IBatteryStats.Stub
             Slog.e(TAG, "Could not register INetworkManagement event observer " + e);
         }
         mStats.systemServicesReady(mContext);
+
+        final DataConnectionStats dataConnectionStats = new DataConnectionStats(mContext, mHandler);
+        dataConnectionStats.startMonitoring();
     }
 
     private final class LocalService extends BatteryStatsInternal {