cleanup ueventd

Bring inline with caf kk_3.5 and moto g stock.

Change-Id: I61eb1584c795caa10828b7fd6d697c15bfae74bc
remove more camera proprietaries

My moto g has ar0543/mt9m114 (back/front) cameras and
I suspect there are no variants with other sensors.

Kernel has also few other camera drivers built in as well
as qcom default cameras. Should be safe to drop proprietaries
for these sensors too.
imx135 (Sony Exmor 13 mpix)
ov8825 (OmniVision 8 mpix)
ov8865 (OmniVision 8 mpix)
ov5693 (OmniVision 5 mpix)

Change-Id: I857e6ceaaddb29e844c4b4920127add5b468ca59
sepolicy: Fixes to enable enforcing

Change-Id: I70c2a053574d3d7ac9c19c6426b228eeb5d0eaa0
Enable selinux enforcing

Change-Id: I41174ce568f87661cbabbe502b066fc3392cd11b