[Android] Remove more references to and uses of AndroidCommands.

tools/telemetry/telemetry/core/platform/power_monitor/android_ds2784_power_monitor.py

Index: tools/telemetry/telemetry/core/platform/power_monitor/android_ds2784_power_monitor.py
diff --git a/tools/telemetry/telemetry/core/platform/power_monitor/android_ds2784_power_monitor.py b/tools/telemetry/telemetry/core/platform/power_monitor/android_ds2784_power_monitor.py
index 25c375b8740de640db74c8e0ed8c236d5b591837..92abae1801677ba26906a9616ae9b1c1bd281141 100644
--- a/tools/telemetry/telemetry/core/platform/power_monitor/android_ds2784_power_monitor.py
+++ b/tools/telemetry/telemetry/core/platform/power_monitor/android_ds2784_power_monitor.py
@@ -5,10 +5,14 @@
 import logging
 import os
 
+from telemetry.core import util
 from telemetry.core.platform.power_monitor import sysfs_power_monitor
 from telemetry.core.platform.profiler import android_prebuilt_profiler_helper
 from telemetry import decorators
 
+util.AddDirToPythonPath(util.GetChromiumSrcDir(), 'build', 'android')
+from pylib.device import battery_utils  # pylint: disable=F0401
+
 
 SAMPLE_RATE_HZ = 2 # The data is collected from the ds2784 fuel gauge chip
                    # that only updates its data every 3.5s.
@@ -27,6 +31,7 @@ class DS2784PowerMonitor(sysfs_power_monitor.SysfsPowerMonitor):
   def __init__(self, device, platform_backend):
     super(DS2784PowerMonitor, self).__init__(platform_backend)
     self._device = device
+    self._device_battery = battery_utils.BatteryUtils(self._device)
     self._powermonitor_process_port = None
     self._file_poller_binary = android_prebuilt_profiler_helper.GetDevicePath(
         'file_poller')
@@ -38,8 +43,8 @@ class DS2784PowerMonitor(sysfs_power_monitor.SysfsPowerMonitor):
   def CanMonitorPower(self):
     if not self._HasFuelGauge():
       return False
-    if self._device.old_interface.IsDeviceCharging():
-      logging.warning('Can\'t monitor power usage since device is charging.')
+    if self._device_battery.GetCharging():
+      logging.warning("Can't monitor power usage since device is charging.")
       return False
     return True