[DeviceService] Move //device/nfc to be part of the internal impl of Device Service

device/nfc/android/java/src/org/chromium/device/nfc/NfcMessageValidator.java

-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package org.chromium.device.nfc;
-
-import org.chromium.device.nfc.mojom.NfcMessage;
-import org.chromium.device.nfc.mojom.NfcRecord;
-import org.chromium.device.nfc.mojom.NfcRecordType;
-
-/**
- * Utility class that provides validation of NfcMessage.
- */
-public final class NfcMessageValidator {
-    /**
-     * Validates NfcMessage.
-     *
-     * @param message to be validated.
-     * @return true if message is valid, false otherwise.
-     */
-    public static boolean isValid(NfcMessage message) {
-        if (message == null || message.data == null || message.data.length == 0) {
-            return false;
-        }
-
-        for (int i = 0; i < message.data.length; ++i) {
-            if (!isValid(message.data[i])) return false;
-        }
-        return true;
-    }
-
-    private static boolean isValid(NfcRecord record) {
-        if (record == null || record.data == null || record.data.length == 0) {
-            return false;
-        }
-
-        if (record.mediaType == null || record.mediaType.isEmpty()
-                || record.recordType == NfcRecordType.EMPTY) {
-            return false;
-        }
-
-        return true;
-    }
-}