Let managed profile owner retrieve enterprise apn

Let managed profile owner retrieve enterprise apn
All override apn functionality should restricted to
device owner or managed profile owner only and not any
profile owner

Bug: 231360296
Test: system test with test dpc to confirm insertion, query and delete
from managed profile works fine

Change-Id: I06cdaa43ef015a5432956cbf2c62fd6c8f3a4353