Initial implementation of HID, add IBluetoothInputDevice idl

Change-Id: Iadc79a425b4b6e12329d86dd2ac0782adcb0174d
diff --git a/core/java/android/bluetooth/BluetoothHeadset.java b/core/java/android/bluetooth/BluetoothHeadset.java
index adf07b4..7797d94 100644
--- a/core/java/android/bluetooth/BluetoothHeadset.java
+++ b/core/java/android/bluetooth/BluetoothHeadset.java
@@ -219,7 +219,7 @@
     private Context mContext;
     private ServiceListener mServiceListener;
     private IBluetoothHeadset mService;
-    BluetoothAdapter mAdapter;
+    private BluetoothAdapter mAdapter;
 
     /**
      * Create a BluetoothHeadset proxy object.