[Android][telemetry] Update pylib imports for modules that moved into devil.

build/android/pylib/base/test_dispatcher_unittest.py

 #!/usr/bin/env python
 # Copyright 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.
 
 """Unittests for test_dispatcher.py."""
 # pylint: disable=R0201
 # pylint: disable=W0212
 
 import os
 import sys
 import unittest
 
 
+from devil.android import device_utils
+from devil.android.sdk import adb_wrapper
+from devil.utils import watchdog_timer
 from pylib import constants
 from pylib.base import base_test_result
 from pylib.base import test_collection
 from pylib.base import test_dispatcher
-from pylib.device import adb_wrapper
-from pylib.device import device_utils
-from pylib.utils import watchdog_timer
 
 sys.path.append(
     os.path.join(constants.DIR_SOURCE_ROOT, 'third_party', 'pymock'))
 import mock
 
 
 class TestException(Exception):
   pass
 
 
@@ skipping 200 matching lines @@
 
   def testNoTests(self):
     results, exit_code = test_dispatcher.RunTests(
         [], MockRunner, [_MockDevice('0'), _MockDevice('1')], shard=False)
     self.assertEqual(len(results.GetAll()), 0)
     self.assertEqual(exit_code, constants.ERROR_EXIT_CODE)
 
 
 if __name__ == '__main__':
   unittest.main()