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

build/android/pylib/gtest/test_package.py

 # Copyright (c) 2012 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.
 
 """Base class representing GTest test packages."""
 # pylint: disable=R0201
 
 
 class TestPackage(object):
 
   """A helper base class for both APK and stand-alone executables.
 
   Args:
     suite_name: Name of the test suite (e.g. base_unittests).
   """
   def __init__(self, suite_name):
     self.suite_name = suite_name
+    self.tool = None
 
   def ClearApplicationState(self, device):
     """Clears the application state.
 
     Args:
       device: Instance of DeviceUtils.
     """
     raise NotImplementedError('Method must be overridden.')
 
   def CreateCommandLineFileOnDevice(self, device, test_filter, test_arguments):
@@ skipping 39 matching lines @@
   def PullAppFiles(self, device, files, directory):
     """Pull application data from the device.
 
     Args:
       device: Instance of DeviceUtils.
       files: A list of paths relative to the application data directory to
         retrieve from the device.
       directory: The host directory to which files should be pulled.
     """
     raise NotImplementedError('Method must be overridden.')