android: Don't require aapt to be on the path during builds and tests.

build/android/gyp/get_device_configuration.py

 #!/usr/bin/env python
 #
 # Copyright 2013 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.
 
 """Gets and writes the configurations of the attached devices.
 
 This configuration is used by later build steps to determine which devices to
 install to and what needs to be installed to those devices.
 """
 
 import logging
 import optparse
 import os
 import subprocess
 import sys
 
 from util import build_utils
 from util import build_device
 
 BUILD_ANDROID_DIR = os.path.join(os.path.dirname(__file__), '..')
 sys.path.append(BUILD_ANDROID_DIR)
 
-from pylib.utils import apk_helper
-
 
 def main(argv):
   parser = optparse.OptionParser()
   parser.add_option('--stamp', action='store')
   parser.add_option('--output', action='store')
   options, _ = parser.parse_args(argv)
 
   devices = build_device.GetAttachedDevices()
 
   device_configurations = []
@@ skipping 29 matching lines @@
         'Multiple devices attached. '
         'Installing to the preferred device: '
         '%(id)s (%(description)s)' % (device_configurations[0]))
 
 
   build_device.WriteConfigurations(device_configurations, options.output)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))