[Android] Move some pylib modules into devil/

build/android/devil/android/md5sum.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 collections
 import logging
 import os
 import posixpath
 import re
 import tempfile
 import types
 
-from pylib import cmd_helper
+from devil.android import device_errors
+from devil.android import device_temp_file
+from devil.utils import cmd_helper
 from pylib import constants
-from pylib.utils import device_temp_file
-from pylib.device import device_errors
 
 MD5SUM_DEVICE_LIB_PATH = '/data/local/tmp/md5sum/'
 MD5SUM_DEVICE_BIN_PATH = MD5SUM_DEVICE_LIB_PATH + 'md5sum_bin'
 
 _STARTS_WITH_CHECKSUM_RE = re.compile(r'^\s*[0-9a-fA-F]{32}\s+')
 
 
 def CalculateHostMd5Sums(paths):
   """Calculates the MD5 sum value for all items in |paths|.
 
@@ skipping 74 matching lines @@
       raise
 
   return _ParseMd5SumOutput(out)
 
 
 def _ParseMd5SumOutput(out):
   hash_and_path = (l.split(None, 1) for l in out
                    if l and _STARTS_WITH_CHECKSUM_RE.match(l))
   return dict((p, h) for h, p in hash_and_path)