dontaudit update_engine access to gsi_metadata_file.

update_engine tries to determine the parent path for all devices (e.g.
/dev/block/by-name) by reading the default fstab and looking for the misc
device. ReadDefaultFstab() checks whether a GSI is running by checking
gsi_metadata_file. We never apply OTAs when GSI is running, so just deny
the access.

Test: no selinux denials
Fixes: 139283697

Change-Id: I3cba28ccb6871b328ab697a4a8f3476ac72f7bed
1 file changed