healthd: Check if battery device exists instead of charger drivers before...

healthd: Check if battery device exists instead of charger drivers before setting fake properties. am: 9cb3d3cc am: f2ca669e
am: 6e394f0f

* commit '6e394f0f':
  healthd: Check if battery device exists instead of charger drivers before setting fake properties.

Change-Id: I7a1f57d749f8460b57c0cbca7bbe87da4ee5a64d