The current translation does not give a clue on the purpose of this menu (the sites authorized for what?..) and only the explanation below clarifies the meaning of «Авторизованные сайты». For example, if we check Google Accounts, its account settings have a similar section - Signing in with Google, the Russian version of which is «Вход через аккаунт Google». Assuming that we need to save space in the Android app interface I suggest «Вход через Telegram».