[telemetry] Sort imports in Telemetry and its dependents.

tools/perf/measurements/v8_detached_context_age_in_gc_unittest.py

Index: tools/perf/measurements/v8_detached_context_age_in_gc_unittest.py
diff --git a/tools/perf/measurements/v8_detached_context_age_in_gc_unittest.py b/tools/perf/measurements/v8_detached_context_age_in_gc_unittest.py
index ed34e016e44c473f200b5650ca00793b22581bf1..4ae6f8d960f61fc6c4298fe019fadc59a9057b1a 100644
--- a/tools/perf/measurements/v8_detached_context_age_in_gc_unittest.py
+++ b/tools/perf/measurements/v8_detached_context_age_in_gc_unittest.py
@@ -2,15 +2,16 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-from measurements import v8_detached_context_age_in_gc
 from telemetry.core import wpr_modes
-from telemetry.page import page_test
 from telemetry.page import page as page_module
+from telemetry.page import page_test
 from telemetry.results import page_test_results
 from telemetry.unittest_util import options_for_unittests
 from telemetry.unittest_util import page_test_test_case
 from telemetry.value import skip
 
+from measurements import v8_detached_context_age_in_gc
+
 
 class FakePage(object):
   def __init__(self, url):