Add script to validate installed Android SDK packages

build/get_sdk_extras_packages.py

 #!/usr/bin/env python
 # Copyright (c) 2014 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.
 
 import json
 import os
 import sys
 
 SDK_EXTRAS_JSON_FILE = os.path.join(os.path.dirname(__file__),
                                     'android_sdk_extras.json')
 
 def main():
   with open(SDK_EXTRAS_JSON_FILE) as json_file:
     packages = json.load(json_file)
+
+  out = []
   for package in packages:
-    print package['package'].replace('_', ' ')
+    out.append(package['package_id'])
 
+  print ','.join(out)
 
 if __name__ == '__main__':
   sys.exit(main())