Allow interact_across_users to get and update AppWidgetOptions

This change allows callers with the interact_across_users permission to
get and update widget options. Additionally, permission grants that are
not longer necessary are cleaned up.

Bug: 375251109
Test: widgets are able to update views in HSUM
Flag: android.appwidget.flags.security_policy_interact_across_users
Change-Id: If14e4f147276fc9870d71846dfa342c3cba9d415