NFC: Adding new vendor specific interface to NFC Service

A new interface was added to INfcAdapter for vendor-specific
extensions and additional features. It needs to be implemented
in all implementations of the interface.

Change-Id: I9aa8b94cfbb04133d67c2272c82409cf7db45fec
diff --git a/src/com/android/nfc/NfcService.java b/src/com/android/nfc/NfcService.java
index 026cb7b..ae769a1 100644
--- a/src/com/android/nfc/NfcService.java
+++ b/src/com/android/nfc/NfcService.java
@@ -1,4 +1,7 @@
 /*
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ * Not a Contribution.
+ *
  * Copyright (C) 2010 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -1093,6 +1096,13 @@
     }
 
     final class NfcAdapterService extends INfcAdapter.Stub {
+        /**
+         * An interface for vendor specific extensions
+         */
+        public IBinder getNfcAdapterVendorInterface(String vendor) {
+            return null;
+        }
+
         @Override
         public boolean enable() throws RemoteException {
             NfcPermissions.enforceAdminPermissions(mContext);