sepolicy: allow init script to read GPU frequencies sysfs node

init script will read GPU frequencies from sysfs node and copy
the values to a system property to allow 3rd party apps that
rely on these frequencies to still work.

CRs-Fixed: 1066935
Change-Id: I0bb0f5e8e060090b0bc470a7113b23ce8cc4a964
4 files changed