frameworks/base: Support for third party NFC features

Integration of below modifications are necessary to support
third party NFC software:

* a new interface in INfcAdapter.aidl allowing vendor specific
  extensions and features
* a new size for MIFARE Classic tags
* a modified constructor to distinguish MIFARE Classic tags
  from NfcA tags
* allowing extensions to AidGroup and changing the protection
  of the instance variables to package protected

Change-Id: Ic11dc68c4ea83262c705ec50b75b5808aa064f82
(integrated from commit 57a001b7851c97d41f042dda643f9a87aa6306e5)

Author: Puneet Mishra

core/java/android/nfc/INfcAdapter.aidl

@@ -1,4 +1,7 @@
 /*
+ * Copyright (c) 2015, 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");
@@ -28,6 +31,7 @@ import android.nfc.INfcTag;
 import android.nfc.INfcCardEmulation;
 import android.nfc.INfcUnlockHandler;
 import android.os.Bundle;
+import android.os.IBinder;
 
 /**
  * @hide
@@ -37,6 +41,7 @@ interface INfcAdapter
     INfcTag getNfcTagInterface();
     INfcCardEmulation getNfcCardEmulationInterface();
     INfcAdapterExtras getNfcAdapterExtrasInterface(in String pkg);
+    IBinder getNfcAdapterVendorInterface(in String vendor);
 
     int getState();
     boolean disable(boolean saveState);

core/java/android/nfc/cardemulation/AidGroup.java

@@ -1,6 +1,9 @@
 /*
  * Copyright (C) 2015 The Android Open Source Project
  *
+ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ * Not a Contribution.
+ *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -37,17 +40,17 @@
  *
  * @hide
  */
-public final class AidGroup implements Parcelable {
+public class AidGroup implements Parcelable {
     /**
      * The maximum number of AIDs that can be present in any one group.
      */
     public static final int MAX_NUM_AIDS = 256;
 
     static final String TAG = "AidGroup";
 
-    final List<String> aids;
-    final String category;
-    final String description;
+    protected List<String> aids;
+    protected String category;
+    protected String description;
 
     /**
      * Creates a new AidGroup object.

core/java/android/nfc/tech/MifareClassic.java

@@ -1,4 +1,6 @@
 /*
+ * Copyright (C) 2015 NXP Semiconductors
+ * The original Work has been changed by NXP Semiconductors.
  * Copyright (C) 2010 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -173,6 +175,10 @@ public MifareClassic(Tag tag) throws RemoteException {
             mType = TYPE_CLASSIC;
             mSize = SIZE_4K;
             break;
+        case 0x19:
+            mType = TYPE_CLASSIC;
+            mSize = SIZE_2K;
+            break;
         case 0x28:
             mType = TYPE_CLASSIC;
             mSize = SIZE_1K;

core/java/android/nfc/tech/NfcA.java

@@ -1,4 +1,6 @@
 /*
+ * Copyright (C) 2015 NXP Semiconductors
+ * The original Work has been changed by NXP Semiconductors.
  * Copyright (C) 2010 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -66,8 +68,15 @@ public static NfcA get(Tag tag) {
     /** @hide */
     public NfcA(Tag tag) throws RemoteException {
         super(tag, TagTechnology.NFC_A);
-        Bundle extras = tag.getTechExtras(TagTechnology.NFC_A);
-        mSak = extras.getShort(EXTRA_SAK);
+        Bundle extras;
+        mSak = 0;
+        if(tag.hasTech(TagTechnology.MIFARE_CLASSIC))
+        {
+            extras = tag.getTechExtras(TagTechnology.MIFARE_CLASSIC);
+            mSak = extras.getShort(EXTRA_SAK);
+        }
+        extras = tag.getTechExtras(TagTechnology.NFC_A);
+        mSak |= extras.getShort(EXTRA_SAK);
         mAtqa = extras.getByteArray(EXTRA_ATQA);
     }