sepolicy: Camera: Add Sepolicy for accessing vendor properties

Issue: To access and read vendor.camera.aux.packagelist
and persist.vendor.camera.privapp.list. Needed to identify
priviledged app and dual camera exposure

Fix: Accessed only on system side thus added flags as
extended_core_property_type

Change-Id: Iba6b2245163edcced81835a66189ae05d13befe4