account-financial-reporting/partner_statement/security/statement_security.xml

<?xml version="1.0" encoding="utf-8" ?>
<odoo>
    <record id="group_activity_statement" model="res.groups">
        <field name="name">Use activity statements</field>
        <field name="category_id" ref="base.module_category_hidden" />
    </record>
    <record id="group_outstanding_statement" model="res.groups">
        <field name="name">Use outstanding statements</field>
        <field name="category_id" ref="base.module_category_hidden" />
    </record>
</odoo>