Don't expect permission to open foreign dex use marks.

sepolicy says we can create the mark files, but open requires
additional permissions we don't need. Don't print a warning when we
aren't given those additional permissions.

Bug: 28241500

(cherry picked from commit 12e41576)

Change-Id: I272befdb4fa58a0adf550fde52ddab5b5f5a9fe3