sepolicy: add omni common selinux policy inclusion

It is required for https://gerrit.omnirom.org/#/c/4563

Change-Id: I22c47febefd986274b53d69f89df6bff589c8ea0
Signed-off-by: Humberto Borba <humberos@gmail.com>
merge changes from Omni 4.4 into local branch