evita: move offmode charging images from common

Rely on recovery_resources_private to copy offmode charging images to
the recovery ramdisk.

Change-Id: Ib5101cb3fff2b5209db151aa9983977417c27925
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_device_htc_evita into cm-11.0