More work on process tracking.

Re-arranged code to be more flexible, now track
state of services, dump ordered list of running
processes while memory was critical and low.

Also rename battery stats service from "batteryinfo" to "batterystats".

Change-Id: I0f4f0c8d443c49d255cb84d0fc917e8ec18b152e

services/java/com/android/server/NetworkManagementService.java

@@ -43,6 +43,7 @@ import android.net.NetworkUtils;
 import android.net.RouteInfo;
 import android.net.wifi.WifiConfiguration;
 import android.net.wifi.WifiConfiguration.KeyMgmt;
+import android.os.BatteryStats;
 import android.os.Binder;
 import android.os.Handler;
 import android.os.INetworkManagementService;
@@ -347,7 +348,7 @@ public class NetworkManagementService extends INetworkManagementService.Stub
 
         if (mBandwidthControlEnabled) {
             try {
-                IBatteryStats.Stub.asInterface(ServiceManager.getService("batteryinfo"))
+                IBatteryStats.Stub.asInterface(ServiceManager.getService(BatteryStats.SERVICE_NAME))
                         .noteNetworkStatsEnabled();
             } catch (RemoteException e) {
             }