SensorService fixes.

   i) Add more debug stats (acks needed, acks received)
  ii) Comment out write failure message.

Change-Id: Iac892a66530849a2dd023d6f5628cd070a79537d
diff --git a/services/sensorservice/SensorService.h b/services/sensorservice/SensorService.h
index 15759ae..77f6f6a 100644
--- a/services/sensorservice/SensorService.h
+++ b/services/sensorservice/SensorService.h
@@ -142,6 +142,7 @@
 
 #if DEBUG_CONNECTIONS
         int mEventsReceived, mEventsSent, mEventsSentFromCache;
+        int mTotalAcksNeeded, mTotalAcksReceived;
 #endif
 
     public: