Add android acceptance test to telemetry.

tools/perf/measurements/power.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 metrics import power
+from telemetry.page import page_test
+
+class Power(page_test.PageTest):
+  def __init__(self):
+    super(Power, self).__init__('RunPowerPageInteractions')
+    self._power_metric = None
+
+  def WillStartBrowser(self, platform):
+    self._power_metric = power.PowerMetric(platform)
+
+  def DidNavigateToPage(self, page, tab):
+    self._power_metric.Start(page, tab)
+
+  def ValidateAndMeasurePage(self, page, tab, results):
+    self._power_metric.Stop(page, tab)
+    self._power_metric.AddResults(tab, results)