[Devil] Do not set charge level when charging devices.

devil/devil/android/battery_utils.py

Index: devil/devil/android/battery_utils.py
diff --git a/devil/devil/android/battery_utils.py b/devil/devil/android/battery_utils.py
index 32070bd6cd21ce0c2e62de0c8cddfdd7f8429616..ff0bd708ab1a32ad93b42ad06b195052d7b1c523 100644
--- a/devil/devil/android/battery_utils.py
+++ b/devil/devil/android/battery_utils.py
@@ -281,14 +281,6 @@ class BatteryUtils(object):
     return {'system_total': system_total, 'per_package': per_package}
 
   @decorators.WithTimeoutAndRetriesFromInstance()
-  def _ForceResetBatteryInfo(self, timeout=None, retries=None):
-    # Sometimes battery information stops updating. This kick starts it.
-    self._device.RunShellCommand(['dumpsys', 'battery', 'set', 'level', '50'],
-                                 check_return=True)
-    self._device.RunShellCommand(['dumpsys', 'battery', 'reset'],
-                                 check_return=True)
-
-  @decorators.WithTimeoutAndRetriesFromInstance()
   def GetBatteryInfo(self, timeout=None, retries=None):
     """Gets battery info for the device.
 
@@ -453,7 +445,6 @@ class BatteryUtils(object):
     self.SetCharging(True)
 
     def device_charged():
-      self._ForceResetBatteryInfo()
       battery_level = self.GetBatteryInfo().get('level')
       if battery_level is None:
         logging.warning('Unable to find current battery level.')