Revert "Save ShortcutUser before rewriting ShortcutPackageItems"

This reverts commit 0c4c18ff00b658f1838255f8f67c924d3d98ed47.

Reason for revert: multiple perf regressions

Bug: 417712196
Change-Id: I6b279545566190aed1b3a3fd41420d10bab9ee39
1 file changed