[telemetry] Sort imports in Telemetry and its dependents.

tools/perf/benchmarks/page_cycler.py

 # 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.
 
+from telemetry import benchmark
+
 from measurements import page_cycler
 import page_sets
-from telemetry import benchmark
 
 
 class _PageCycler(benchmark.Benchmark):
   options = {'pageset_repeat': 6}
   cold_load_percent = 50  # % of page visits for which a cold load is forced
 
   @classmethod
   def Name(cls):
     return 'page_cycler'
 
@@ skipping 210 matching lines @@
 
   def CreatePageSet(self, options):
     return page_sets.Typical25PageSet(run_no_page_interactions=True)
 
 @benchmark.Disabled # crbug.com/443730
 class PageCyclerBigJs(_PageCycler):
   page_set = page_sets.BigJsPageSet
   @classmethod
   def Name(cls):
     return 'page_cycler.big_js'