[telemetry] Sort imports in Telemetry and its dependents.

tools/telemetry/telemetry/core/browser_finder.py

 # Copyright 2012 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.
 
 """Finds browsers that can be controlled by telemetry."""
 
 import logging
 import operator
 
-from telemetry import decorators
-from telemetry.core import browser_finder_exceptions
-from telemetry.core import device_finder
 from telemetry.core.backends.chrome import android_browser_finder
 from telemetry.core.backends.chrome import cros_browser_finder
 from telemetry.core.backends.chrome import desktop_browser_finder
 from telemetry.core.backends.chrome import ios_browser_finder
 from telemetry.core.backends.remote import trybot_browser_finder
 from telemetry.core.backends.webdriver import webdriver_desktop_browser_finder
+from telemetry.core import browser_finder_exceptions
+from telemetry.core import device_finder
+from telemetry import decorators
 
 BROWSER_FINDERS = [
   desktop_browser_finder,
   android_browser_finder,
   cros_browser_finder,
   ios_browser_finder,
   trybot_browser_finder,
   webdriver_desktop_browser_finder,
   ]
 
@@ skipping 135 matching lines @@
     BrowserFinderException: Options are improperly set, or an error occurred.
   """
   devices = device_finder.GetDevicesMatchingOptions(options)
   possible_browsers = []
   for device in devices:
     possible_browsers.extend(GetAllAvailableBrowsers(options, device))
   type_list = set([browser.browser_type for browser in possible_browsers])
   type_list = list(type_list)
   type_list.sort()
   return type_list