Updater: do not use hidden field

BatteryManager#BATTERY_PLUGGED_ANY is hidden and actually just
a combination of all public available plugged values.
Recreate the hidden field instead of using it directly.

This unbreaks Android Studio builds.

Change-Id: I4754ce7544dab22306eeac03c3e9f26b650094d2
Signed-off-by: Alexander Martinz <amartinz@shiftphones.com>