use the default legacy hwcomposer

Conflicts:
	blade.mk

Change-Id: I15f044290c5cf9be08259a8c6dea6e26fce4d45c
delete some unused props

Conflicts:
	system.prop

Change-Id: I64629e48c23bb713d6c58c3469509701c660b5c1
reduce video recording jittering

increase framerate at the cost of reducing frame width & height sizes

Change-Id: Ia2d8a1e07fa4973909abc7e111754e6f0a47d9d4