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 branch 'android-4.4' of https://github.com/omnirom/android_build into android-4.4