Make MTU value consitent when posting events

Bug: b/31395330
Change-Id: I28d9ec958a4c5d8c03f3dd872d1dad3cef7d89b2
(cherry picked from commit d5429c42078d71283c25e330bc6aba252bbbb42c)
diff --git a/Common/src/com/googlecode/android_scripting/facade/bluetooth/GattServerFacade.java b/Common/src/com/googlecode/android_scripting/facade/bluetooth/GattServerFacade.java
index 66f8b7c..c5d26af 100644
--- a/Common/src/com/googlecode/android_scripting/facade/bluetooth/GattServerFacade.java
+++ b/Common/src/com/googlecode/android_scripting/facade/bluetooth/GattServerFacade.java
@@ -584,7 +584,7 @@
     public void onMtuChanged(BluetoothDevice device, int mtu) {
       Log.d("gatt_server change onMtuChanged " + mEventType + " " + index);
       mResults.putParcelable("BluetoothDevice", device);
-      mResults.putInt("mtu", mtu);
+      mResults.putInt("MTU", mtu);
       mEventFacade.postEvent(mEventType + index + "onMtuChanged", mResults.clone());
       mResults.clear();
     }