Disable debug log by default

Prevent verbose log (15k logs in 3s) by default

Change-Id: I13fdd0ecfcff8f9f5de59ba91fd9f0b4abf02f7f
diff --git a/framework-t/src/android/net/TrafficStats.java b/framework-t/src/android/net/TrafficStats.java
index 3b6a69b..e3d4d3f 100644
--- a/framework-t/src/android/net/TrafficStats.java
+++ b/framework-t/src/android/net/TrafficStats.java
@@ -242,8 +242,8 @@
 
     private static class SocketTagger extends dalvik.system.SocketTagger {
 
-        // TODO: set to false
-        private static final boolean LOGD = true;
+        // Enable log with `setprop log.tag.TrafficStats DEBUG` and restart the module.
+        private static final boolean LOGD = Log.isLoggable(TAG, Log.DEBUG);
 
         SocketTagger() {
         }