[telemetry] Sort imports in Telemetry and its dependents.

tools/perf/benchmarks/thread_times.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.
 
+from telemetry import benchmark
+
 from benchmarks import silk_flags
 from measurements import thread_times
 import page_sets
-from telemetry import benchmark
 
 class _ThreadTimes(benchmark.Benchmark):
   @classmethod
   def AddBenchmarkCommandLineArgs(cls, parser):
     parser.add_option('--report-silk-details', action='store_true',
                       help='Report details relevant to silk.')
 
   @classmethod
   def Name(cls):
     return 'thread_times'
@@ skipping 62 matching lines @@
 
 @benchmark.Enabled('android')
 class ThreadTimesPolymer(_ThreadTimes):
   """Measures timeline metrics while performing smoothness action on
   Polymer cases."""
   page_set = page_sets.PolymerPageSet
   @classmethod
   def Name(cls):
     return 'thread_times.polymer'