Redirect memtag libraries to snapshot

memtag sanitizer libraries are vendor available and can be captured as
snapshots. This change adds a redirection logic for memtag libraries.

This is just a workaround, just like other SnapshotInfoProvider calls.
In the future we need to refactor these codes. So TODO is added to
remind refactoring.

Bug: 178470649
Test: soong test
Change-Id: Id77f1ce94255b56a68f3e1d7446a68189c45ac54