Deprecate the ArtUffdSupport dimension in ART atoms

Originally the ArtUffdSupport dimension was added to retrieve from
devices in the field whether they supported userfaultfd and its
minor-fault mode. Now the dimension can be deprecated as the code
path handling the minor-fault mode has been removed from the
Concurrent Mark-Compact (CMC) garbage collector due to performance
issues.

Bug: 417227405
Test: atest ArtGtestsTargetChroot
Flag: EXEMPT metrics change
Change-Id: I1f458de28ad65c29d9649b79b383eee482c70785