[telemetry] Sort imports in Telemetry and its dependents.

tools/perf/measurements/smoothness_unittest.py

Index: tools/perf/measurements/smoothness_unittest.py
diff --git a/tools/perf/measurements/smoothness_unittest.py b/tools/perf/measurements/smoothness_unittest.py
index 7e791087249f66c59030ab4f1cdae328b142dff5..c8805f18af452bfd6c5e7174e95eadc28f1f74df 100644
--- a/tools/perf/measurements/smoothness_unittest.py
+++ b/tools/perf/measurements/smoothness_unittest.py
@@ -3,15 +3,17 @@
 # found in the LICENSE file.
 import sys
 
-from measurements import smoothness
-from metrics import power
-from telemetry import decorators
 from telemetry.core import exceptions
 from telemetry.core import wpr_modes
+from telemetry import decorators
 from telemetry.page import page
 from telemetry.unittest_util import options_for_unittests
 from telemetry.unittest_util import page_test_test_case
 
+from measurements import smoothness
+from metrics import power
+
+
 class FakeTracingController(object):
   def __init__(self):
     self.category_filter = None