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

build/android/pylib/uirobot/uirobot_test_instance.py

 # 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 json
 import logging
 
 from devil.android import apk_helper
-from pylib import constants
 from pylib.base import test_instance
 
 class UirobotTestInstance(test_instance.TestInstance):
 
   def __init__(self, args, error_func):
     """Constructor.
 
     Args:
       args: Command line arguments.
     """
@@ skipping 49 matching lines @@
     return self._minutes
 
   @property
   def package_name(self):
     """Returns the name of the package in the APK."""
     return self._package_name
 
   @property
   def suite(self):
     return self._suite