hammerhead: Suppress secure erase

Use the hack to speed up flashing (by the factor of 10).

Change-Id: I921bba5561bcca23fd94c9ada4d1e433389fb6e9

Conflicts:
	BoardConfig.mk
liblight: Add battery light support

Change-Id: I4b73363545b71fbb435b9b577fdfff30d756b90c

Conflicts:
	overlay/frameworks/base/core/res/res/values/config.xml