Porting Factory OTA sepolicy to Coral

Bug: 127753298
Test: Test new Factory OTA setting on flame device.
ROM information as following:
Device: flame (Google)
Build: flame-eng Q MASTER eng.henryt.20190403.140443 dev-keys
Build Date: Wed Apr 3 14:03:36 CST 2019
Uptime: 14:55:15 up 3 min, 0 users, load average: 5.52, 2.60, 1.07
Modem Baseband Version: g8150-00437-190328-B-5413421

Change-Id: I165ff78f5442adcc336cc12acb86f92b07870199