p31xx: add selinux policies

Change-Id: I861ac9ea3583d98e76dd80308f45f0ff51fbb413
p31xx: refine sepolicies

Change-Id: I1713e9e12a4ff3d6d760e315a2031908fe4dcd8f
p3100: refine sepolicies

Change-Id: I7a88c22c41e5ec5e5dc74b87509215986f859dbe
Merge branch 'cm-10.2' into martincz