Small improvements to api.platforms.android.

appengine/swarming/swarming_bot/__main__.py

 # Copyright 2014 The Swarming Authors. All rights reserved.
 # Use of this source code is governed by the Apache v2.0 license that can be
 # found in the LICENSE file.
 
 """Runs either task_runner.py, bot_main.py or bot_config.py.
 
 The imports are done late so if an ImportError occurs, it is localized to this
 command only.
 """
 
 import code
 import json
 import logging
 import os
 import optparse
 import shutil
-import signal
 import sys
 import zipfile
 
 from bot_code import common
 
 from third_party.depot_tools import fix_encoding
 from utils import logging_utils
 from utils import zip_package
 
 # This file can only be run as a zip.
@@ skipping 157 matching lines @@
       with zipfile.ZipFile(THIS_FILE, 'r') as f:
         logging.error('Files in %s:\n%s', THIS_FILE, f.namelist())
       return 1
 
   print >> sys.stderr, 'Unknown command %s' % cmd
   return 1
 
 
 if __name__ == '__main__':
   sys.exit(main())