Migrate bandwidth control to NMS, omit history.

Both stats and policy make NMS calls that depend on bandwidth control
being enabled, so move enable/disable into NMS and drop calls when
disabled.  This avoids throwing heavy ISE exceptions when disabled.

Only include recent data when writing NetworkStatsHistory as part of
dumpsys call.  Introduce manual poll event for Settings UI.

Bug: 4982115, 4770435, 4515856
Change-Id: I257820b057af2f0f99c736fb4f61e55b9fdc3e66
diff --git a/services/java/com/android/server/SystemServer.java b/services/java/com/android/server/SystemServer.java
index dbfd145..8c7e279 100644
--- a/services/java/com/android/server/SystemServer.java
+++ b/services/java/com/android/server/SystemServer.java
@@ -523,6 +523,7 @@
         // These are needed to propagate to the runnable below.
         final Context contextF = context;
         final BatteryService batteryF = battery;
+        final NetworkManagementService networkManagementF = networkManagement;
         final NetworkStatsService networkStatsF = networkStats;
         final NetworkPolicyManagerService networkPolicyF = networkPolicy;
         final ConnectivityService connectivityF = connectivity;
@@ -550,6 +551,7 @@
 
                 startSystemUi(contextF);
                 if (batteryF != null) batteryF.systemReady();
+                if (networkManagementF != null) networkManagementF.systemReady();
                 if (networkStatsF != null) networkStatsF.systemReady();
                 if (networkPolicyF != null) networkPolicyF.systemReady();
                 if (connectivityF != null) connectivityF.systemReady();