Squashed min/max brightness limits
lower min brightness from 10 to 3

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

Change-Id: I957e7e830f913c83123a5b8d610c45ff8d805f80

max brightness should be set to 127

Set minimumscreenbrightness to 4
liblights: fix leds for brightness < 8