[Android] Lint the rest of pylib.

build/android/pylib/instrumentation/test_jar.py

 # Copyright (c) 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.
 
 """Helper class for instrumenation test jar."""
 # pylint: disable=W0702
 
 import collections
 import logging
 import os
 import pickle
 import re
 import sys
 
 from pylib import cmd_helper
 from pylib import constants
 
 sys.path.insert(0,
                 os.path.join(constants.DIR_SOURCE_ROOT,
                              'build', 'util', 'lib', 'common'))
 
-import unittest_util
+import unittest_util # pylint: disable=F0401
 
 # If you change the cached output of proguard, increment this number
 PICKLE_FORMAT_VERSION = 1
 
 
 class TestJar(object):
   _ANNOTATIONS = frozenset(
       ['Smoke', 'SmallTest', 'MediumTest', 'LargeTest', 'EnormousTest',
        'FlakyTest', 'DisabledTest', 'Manual', 'PerfTest', 'HostDrivenTest'])
   _DEFAULT_ANNOTATION = 'SmallTest'
@@ skipping 193 matching lines @@
           sanitized_test_names[t] for t in unittest_util.FilterTestNames(
               sanitized_test_names.keys(), test_filter.replace('#', '.'))]
     else:
       tests = available_tests
 
     return tests
 
   @staticmethod
   def IsHostDrivenTest(test):
     return 'pythonDrivenTests' in test