Request all tethering interfaces, fix corruption.

netd now tracks statistics for tethered interfaces across tethering
sessions, so switch to asking for all tethering stats.  (Currently
we're double-counting all tethering data, ever since it started
tracking across sessions.)

Also catch OOME to handle corrupt stats files, which we then dump to
DropBox and then start over.

Bug: 5868832, 9796109
Change-Id: I2eb2a1bf01b993dd198597d770fe0e022466c6b9
diff --git a/services/java/com/android/server/ConnectivityService.java b/services/java/com/android/server/ConnectivityService.java
index 02a78de..eca7af7 100644
--- a/services/java/com/android/server/ConnectivityService.java
+++ b/services/java/com/android/server/ConnectivityService.java
@@ -58,8 +58,8 @@
 import android.net.INetworkStatsService;
 import android.net.LinkAddress;
 import android.net.LinkProperties;
-import android.net.LinkQualityInfo;
 import android.net.LinkProperties.CompareResult;
+import android.net.LinkQualityInfo;
 import android.net.MobileDataStateTracker;
 import android.net.NetworkConfig;
 import android.net.NetworkInfo;
@@ -89,7 +89,6 @@
 import android.os.PowerManager;
 import android.os.Process;
 import android.os.RemoteException;
-import android.os.ResultReceiver;
 import android.os.ServiceManager;
 import android.os.SystemClock;
 import android.os.SystemProperties;
@@ -114,7 +113,6 @@
 import com.android.internal.telephony.PhoneConstants;
 import com.android.internal.util.IndentingPrintWriter;
 import com.android.internal.util.XmlUtils;
-import com.android.net.IProxyService;
 import com.android.server.am.BatteryStatsService;
 import com.android.server.connectivity.DataConnectionStats;
 import com.android.server.connectivity.Nat464Xlat;
@@ -3209,12 +3207,6 @@
         return mTethering.getTetheredIfaces();
     }
 
-    @Override
-    public String[] getTetheredIfacePairs() {
-        enforceTetherAccessPermission();
-        return mTethering.getTetheredIfacePairs();
-    }
-
     public String[] getTetheringErroredIfaces() {
         enforceTetherAccessPermission();
         return mTethering.getErroredIfaces();