[Android] Add a custom pylintrc for build/android/.

build/android/devil/android/md5sum_test.py

 #!/usr/bin/env python
 # Copyright 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 os
 import sys
 import unittest
 
 from devil.android import device_errors
 from devil.android import md5sum
-from devil.utils import cmd_helper
 from pylib import constants
 
 sys.path.append(
     os.path.join(constants.DIR_SOURCE_ROOT, 'third_party', 'pymock'))
-import mock
+import mock # pylint: disable=import-error
 
 TEST_OUT_DIR = os.path.join('test', 'out', 'directory')
 HOST_MD5_EXECUTABLE = os.path.join(TEST_OUT_DIR, 'md5sum_bin_host')
 
 class Md5SumTest(unittest.TestCase):
 
   def setUp(self):
     self._patchers = [
         mock.patch('pylib.constants.GetOutDirectory',
                    new=mock.Mock(return_value=TEST_OUT_DIR)),
@@ skipping 197 matching lines @@
       self.assertEquals('0123456789abcdeffedcba9876543210',
                         out['/storage/emulated/legacy/test/file.dat'])
       self.assertEquals(3, len(device.RunShellCommand.call_args_list))
       device.adb.Push.assert_called_once_with(
           'test/out/directory/md5sum_dist', '/data/local/tmp/md5sum/')
 
 
 if __name__ == '__main__':
   unittest.main(verbosity=2)