Don't require CONNECTIVITY_INTERNAL check for protected broadcasts

This change removes requirement that sender has this permission for
protected broadcasts (since they can only come from framework)

Bug: 17409667

Change-Id: I3431c20a4ed28b3ba2bfc3cf53772e63a3424a2c
diff --git a/services/core/java/com/android/server/net/NetworkStatsService.java b/services/core/java/com/android/server/net/NetworkStatsService.java
index f995dee..b5aa4d8 100644
--- a/services/core/java/com/android/server/net/NetworkStatsService.java
+++ b/services/core/java/com/android/server/net/NetworkStatsService.java
@@ -318,7 +318,7 @@
 
         // watch for tethering changes
         final IntentFilter tetherFilter = new IntentFilter(ACTION_TETHER_STATE_CHANGED);
-        mContext.registerReceiver(mTetherReceiver, tetherFilter, CONNECTIVITY_INTERNAL, mHandler);
+        mContext.registerReceiver(mTetherReceiver, tetherFilter, null, mHandler);
 
         // listen for periodic polling events
         final IntentFilter pollFilter = new IntentFilter(ACTION_NETWORK_STATS_POLL);