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

build/android/incremental_install.py

 #!/usr/bin/env python
 #
 # Copyright 2015 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.
 
 """Install *_incremental.apk targets as well as their dependent files."""
 
 import argparse
 import glob
 import logging
-import os
 import posixpath
 import sys
 import time
 
 from devil.android import apk_helper
 from devil.android import device_utils
 from devil.android import device_errors
 from devil.utils import reraiser_thread
 from pylib import constants
 
@@ skipping 77 matching lines @@
       device.PushChangedFiles([(args.lib_dir, device_lib_dir)],
                               delete_device_stale=True)
   # Concurrency here speeds things up quite a bit, but DeviceUtils hasn't
   # been designed for multi-threading. Enabling only because this is a
   # developer-only tool.
   if args.no_threading:
     do_install()
     do_push_libs()
   else:
     reraiser_thread.RunAsync((do_install, do_push_libs))
-  logging.info('Took %s seconds' % round(time.time() - start_time, 1))
+  logging.info('Took %s seconds', round(time.time() - start_time, 1))
 
 
 if __name__ == '__main__':
   sys.exit(main())