jf: remove persist.radio.apm_sim_not_pwdn prop

Change-Id: If87a78d291dea6b442d000e8ec1566cc62d0ee05
sepolicy: mount firmware partitions with firmware_file context

* we don't need to give ueventd and mdm_helper access across the
  entire vfat context

Change-Id: Ie50be652d40e87f09f8becc8b33aed472ad54d76

Conflicts:
	rootdir/etc/fstab.qcom