RESTRICT AUTOMERGE Relax security exception for backport

The original backport for this bug threw an exception when the caller
didn't hold the INTERACT_ACROSS_USERS permission; even when it queried
for its own packages.

Now, we simply ignore the request to match any user.

Bug: 77821568
Test: manual
Change-Id: I5716b50a7fb18def20323b872ddef06fa9723b13