[Android][Telemetry] Add support for multiple power monitors

tools/telemetry/telemetry/internal/platform/android_platform_backend.py

 # Copyright 2013 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.
 
 import logging
 import os
 import re
 import shutil
 import stat
 import subprocess
 import tempfile
 
 from catapult_base import binary_manager
 from telemetry.core import android_platform
 from telemetry.core import exceptions
 from telemetry.core import platform
 from telemetry.core import util
 from telemetry import decorators
 from telemetry.internal.forwarders import android_forwarder
 from telemetry.internal.image_processing import video
 from telemetry.internal.platform import android_device
 from telemetry.internal.platform import linux_based_platform_backend
 from telemetry.internal.platform.power_monitor import android_dumpsys_power_monitor
 from telemetry.internal.platform.power_monitor import android_temperature_monitor
 from telemetry.internal.platform.power_monitor import monsoon_power_monitor
 from telemetry.internal.platform.power_monitor import power_monitor_controller
+from telemetry.internal.platform.power_monitor import sysfs_power_monitor
 from telemetry.internal.platform.profiler import android_prebuilt_profiler_helper
 from telemetry.internal.util import exception_formatter
 from telemetry.internal.util import external_modules
 
 psutil = external_modules.ImportOptionalModule('psutil')
 util.AddDirToPythonPath(util.GetChromiumSrcDir(),
                         'third_party', 'webpagereplay')
 import adb_install_cert
 import certutils
 import platformsettings
@@ skipping 121 matching lines @@
     try:
       self._can_access_protected_file_contents = (
           self._device.HasRoot() or self._device.NeedsSU())
     except:
       logging.exception('New exception caused by DeviceUtils conversion')
       raise
     self._device_copy_script = None
     power_controller = power_monitor_controller.PowerMonitorController([
         monsoon_power_monitor.MonsoonPowerMonitor(self._device, self),
         android_dumpsys_power_monitor.DumpsysPowerMonitor(self._battery, self),
+        sysfs_power_monitor.SysfsPowerMonitor(self, standalone=True),
     ], self._battery)
     self._power_monitor = android_temperature_monitor.AndroidTemperatureMonitor(
         power_controller, self._device)
     self._video_recorder = None
     self._installed_applications = None
 
     self._wpr_ca_cert_path = None
     self._device_cert_util = None
     self._is_test_ca_installed = False
 
@@ skipping 652 matching lines @@
   for process in psutil.process_iter():
     try:
       if psutil.version_info >= (2, 0):
         if 'adb' in process.name():
           process.cpu_affinity([0])
       else:
         if 'adb' in process.name:
           process.set_cpu_affinity([0])
     except (psutil.NoSuchProcess, psutil.AccessDenied):
       logging.warn('Failed to set adb process CPU affinity')