Send broadcast when changing restrict background.

When changing global restrict background status, send connectivity
change broadcast, since it radically changes DISCONNECTED/BLOCKED
status system-wide.

Also reduce verbose stats logging.

Bug: 5854466
Change-Id: I3b612c520f50cc3000a3a569b7e0ab5f691cc2bd
diff --git a/services/java/com/android/server/net/NetworkPolicyManagerService.java b/services/java/com/android/server/net/NetworkPolicyManagerService.java
index 9772d6a..a890068 100644
--- a/services/java/com/android/server/net/NetworkPolicyManagerService.java
+++ b/services/java/com/android/server/net/NetworkPolicyManagerService.java
@@ -195,6 +195,7 @@
     private static final int MSG_FOREGROUND_ACTIVITIES_CHANGED = 3;
     private static final int MSG_PROCESS_DIED = 4;
     private static final int MSG_LIMIT_REACHED = 5;
+    private static final int MSG_RESTRICT_BACKGROUND_CHANGED = 6;
 
     private final Context mContext;
     private final IActivityManager mActivityManager;
@@ -1225,6 +1226,9 @@
             updateNotificationsLocked();
             writePolicyLocked();
         }
+
+        mHandler.obtainMessage(MSG_RESTRICT_BACKGROUND_CHANGED, restrictBackground ? 1 : 0, 0)
+                .sendToTarget();
     }
 
     @Override
@@ -1573,6 +1577,20 @@
                     }
                     return true;
                 }
+                case MSG_RESTRICT_BACKGROUND_CHANGED: {
+                    final boolean restrictBackground = msg.arg1 != 0;
+                    final int length = mListeners.beginBroadcast();
+                    for (int i = 0; i < length; i++) {
+                        final INetworkPolicyListener listener = mListeners.getBroadcastItem(i);
+                        if (listener != null) {
+                            try {
+                                listener.onRestrictBackgroundChanged(restrictBackground);
+                            } catch (RemoteException e) {
+                            }
+                        }
+                    }
+                    mListeners.finishBroadcast();
+                }
                 default: {
                     return false;
                 }
diff --git a/services/java/com/android/server/net/NetworkStatsRecorder.java b/services/java/com/android/server/net/NetworkStatsRecorder.java
index e7ba358..240cc1c 100644
--- a/services/java/com/android/server/net/NetworkStatsRecorder.java
+++ b/services/java/com/android/server/net/NetworkStatsRecorder.java
@@ -51,6 +51,7 @@
 public class NetworkStatsRecorder {
     private static final String TAG = "NetworkStatsRecorder";
     private static final boolean LOGD = true;
+    private static final boolean LOGV = false;
 
     private final FileRotator mRotator;
     private final NonMonotonicObserver<String> mObserver;
@@ -170,7 +171,7 @@
 
         mLastSnapshot = snapshot;
 
-        if (LOGD && unknownIfaces.size() > 0) {
+        if (LOGV && unknownIfaces.size() > 0) {
             Slog.w(TAG, "unknown interfaces " + unknownIfaces + ", ignoring those stats");
         }
     }