[telemetry] Sort imports in Telemetry and its dependents.

tools/perf/benchmarks/polymer_load.py

Index: tools/perf/benchmarks/polymer_load.py
diff --git a/tools/perf/benchmarks/polymer_load.py b/tools/perf/benchmarks/polymer_load.py
index 031fc88f79fa52282107bcf8d399de751746b673..17caf5a8b158e38de99654cb1b8e3a8e572c5dc0 100644
--- a/tools/perf/benchmarks/polymer_load.py
+++ b/tools/perf/benchmarks/polymer_load.py
@@ -2,9 +2,10 @@
 # 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 polymer_load
 import page_sets
-from telemetry import benchmark
 
 
 @benchmark.Enabled('android')