[telemetry] Sort imports in Telemetry and its dependents.

tools/telemetry/telemetry/user_story/user_story_runner.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 logging
 import optparse
 import os
 import random
 import sys
 import time
 
-from telemetry import page as page_module
 from telemetry.core import exceptions
 from telemetry.core import wpr_modes
+from telemetry import page as page_module
+from telemetry.page.actions import page_action
 from telemetry.page import page_set as page_set_module
 from telemetry.page import page_test
-from telemetry.page.actions import page_action
 from telemetry.results import results_options
 from telemetry.user_story import user_story_filter
 from telemetry.user_story import user_story_set as user_story_set_module
 from telemetry.util import cloud_storage
 from telemetry.util import exception_formatter
 from telemetry.value import failure
 from telemetry.value import skip
 
 
 class ArchiveError(Exception):
@@ skipping 308 matching lines @@
     logging.warning('Device is thermally throttled before running '
                     'performance tests, results will vary.')
 
 
 def _CheckThermalThrottling(platform):
   if not platform.CanMonitorThermalThrottling():
     return
   if platform.HasBeenThermallyThrottled():
     logging.warning('Device has been thermally throttled during '
                     'performance tests, results will vary.')