display: remove dontaudit for hal_memtrack_default

Bug: 181913683
Test: make pts -j60 pts-tradefed run pts -m PtsSELinuxTest -t
com.google.android.selinux.pts.SELinuxTest#scanAvcDeniedLogRightAfterReboot

Change-Id: I72963aed5aff9bcbf2de16b11b16033ca594d7f0
1 file changed