Fix battery controller non-fire bug

Receiver wasn't registered to listen for the action coming
back from the Alarm Manager.
Also, if a task starts being tracked by the battery controller
and the device is on power, the batt. controller will notify
the scheduler as such.
Added dumpsys for battery controller to help debugging.
Change-Id: I7ce305b816aea69e8d05a3daf23124c163546788