bug 851361 -- Revert "Merge pull request mozilla-b2g#8726 from leob2g…

…/Bug_852361_Device_is_shut_down_when_battery_level_become_two_percents"

This reverts commit a7f1e92, reversing
changes made to bd39845.

apps/system/js/battery_manager.js

@@ -8,7 +8,7 @@ var BatteryManager = {
   TRANSITION_SPEED: 1.8,
   TRANSITION_FRACTION: 0.30,
 
-  AUTO_SHUTDOWN_LEVEL: 0.00,
+  AUTO_SHUTDOWN_LEVEL: 0.02,
   EMPTY_BATTERY_LEVEL: 0.1,
 
   _battery: window.navigator.battery,