[Android] Remove devil forwarding modules from pylib.

build/android/incremental_install/installer.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 shutil
 import sys
 import zipfile
 
 sys.path.append(
     os.path.abspath(os.path.join(os.path.dirname(__file__), os.pardir)))
 import devil_chromium
 from devil.android import apk_helper
 from devil.android import device_utils
 from devil.android import device_errors
 from devil.android.sdk import version_codes
 from devil.utils import reraiser_thread
+from devil.utils import run_tests_helper
 from pylib import constants
-from pylib.utils import run_tests_helper
 from pylib.utils import time_profile
 
 prev_sys_path = list(sys.path)
 sys.path.insert(0, os.path.join(os.path.dirname(__file__), os.pardir, 'gyp'))
 from util import build_utils
 sys.path = prev_sys_path
 
 
 def _DeviceCachePath(device):
   file_name = 'device_cache_%s.json' % device.adb.GetDeviceSerial()
@@ skipping 270 matching lines @@
   else:
     Install(device, apk, split_globs=args.splits, native_libs=args.native_libs,
             dex_files=args.dex_files, enable_device_cache=args.cache,
             use_concurrency=args.threading,
             show_proguard_warning=args.show_proguard_warning,
             allow_downgrade=args.allow_downgrade)
 
 
 if __name__ == '__main__':
   sys.exit(main())