n7100: fix up sensors

-dibable all sensors when screen is off.

port from t0: http://review.cyanogenmod.org/#/c/60292/

Change-Id: I66566f5a17acdc7c6dda84eef81af928567cfa37
n7100: fix compass

port from t0: http://review.cyanogenmod.org/#/c/60406/1

Change-Id: I7635f037c5aee8f7eaf852770ad71037c50a5410
n7100: add selinux policies

port from i9300: http://review.cyanogenmod.org/#/c/47915/5

Change-Id: If232f942449b6a01a178cca36a5bc47fa6e4c8d6