flag_rules_action_trim() unnecesarily checks current user for permission via flag_trim_flag()

Rules are setup by administrators and should be able to be activated and executed successfully by any user regardless of their permissions.

Use case:
Using flag to promote nodes to various sections. We want to prevent the user form removing flags because theycan break site layout but we want to trim the flag count to a reasonable number to list the most recently flagged item(s),

The trim a flag rule should be activated by the users flagging operation and should complete successfully or at least provide an option to ignore current user permissions. Almost veery other rule i can think of circumvents user_access() (drupal commerce order states, publish/unpublish, etc).

If a maintainer agrees we'd be happy to patch otherwise we have to write our own custom rule.