hammerhead: add charger service
hammerhead: add charger service

Change-Id: I464527b075d6dba15b754c59fe9865776baf681e

maruos/android_device_lge_hammerhead,maruos/android_device_lge_hammerhead,maruos/android_device_lge_hammerhead,maruos/android_device_lge_hammerhead