Fixes NetworkInterface.list crash on Android

sdk/lib/io/socket.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart.io;
 
 
 /**
  * [InternetAddressType] is the type an [InternetAddress]. Currently,
  * IP version 4 (IPv4) and IP version 6 (IPv6) are supported.
@@ skipping 127 matching lines @@
    * [InternetAddressType.IP_V6] it will only lookup addresses of the
    * specified type. The order of the list can, and most likely will,
    * change over time.
    */
   external static Future<List<InternetAddress>> lookup(
       String host, {InternetAddressType type: InternetAddressType.ANY});
 }
 
 
 /**
- * A [NetworkInterface] represent an active network interface on the current
- * system. It contains a list of [InternetAddress]s, that's bound to the
+ * A [NetworkInterface] represents an active network interface on the current
+ * system. It contains a list of [InternetAddress]es that are bound to the
  * interface.
  */
 abstract class NetworkInterface {
   /**
    * Get the name of the [NetworkInterface].
    */
   String get name;
 
   /**
    * Get the index of the [NetworkInterface].
    */
   String get index;
 
   /**
-   * Get a list of [InternetAddress]s currently bound to this
+   * Get a list of [InternetAddress]es currently bound to this
    * [NetworkInterface].
    */
   List<InternetAddress> get addresses;
 
   /**
+   * Whether [list] is supported.
+   *
+   * [list] is currently unsupported on Android.
+   */
+  external static bool get listSupported;
+
+  /**
    * Query the system for [NetworkInterface]s.
    *
    * If [includeLoopback] is `true`, the returned list will include the
    * loopback device. Default is `false`.
    *
    * If [includeLinkLocal] is `true`, the list of addresses of the returned
    * [NetworkInterface]s, may include link local addresses. Default is `false`.
    *
    * If [type] is either [InternetAddressType.IP_V4] or
    * [InternetAddressType.IP_V6] it will only lookup addresses of the
@@ skipping 533 matching lines @@
     }
     if (address != null) {
       sb.write(", address = ${address.host}");
     }
     if (port != null) {
       sb.write(", port = $port");
     }
     return sb.toString();
   }
 }