Update L2U string for face unlock in settings

    <!-- Button text in face settings which lets the user enroll their face [CHAR LIMIT=40] -->

    <string name="security_settings_face_settings_enroll">Set up face unlock</string>

    <!-- Text shown in face settings explaining what your face can be used for. [CHAR LIMIT=NONE] -->

    <string name="security_settings_face_settings_footer">Use face unlock to unlock your device, sign in to apps, and confirm payments.\n\nKeep in mind:\nLooking at the phone can unlock it when you don\u2019t intend to.\n\nYour phone can be unlocked by someone else if it\u2019s held up to your face while your eyes are open.\n\nYour phone can be unlocked by someone who looks a lot like you, say, an identical sibling.</string>

    <string name="security_settings_face_settings_footer">Use face unlock to unlock your device, sign in to apps, and confirm payments.\n\nKeep in mind:\nLooking at the phone can unlock it when you don\u2019t intend to.\n\nYour phone can be unlocked by someone else if it\u2019s held up to your face.\n\nYour phone can be unlocked by someone who looks a lot like you, say, an identical sibling.</string>

    <!-- Text shown in face settings explaining what your face can be used for. Used when attention checking is not supported. [CHAR LIMIT=NONE] -->

    <string name="security_settings_face_settings_footer_attention_not_supported">Use face unlock to unlock your device, sign in to apps, and confirm payments.\n\nKeep in mind:\nLooking at the phone can unlock it when you don\u2019t intend to.\n\nYour phone can be unlocked by someone else if it\u2019s held up to your face, even if your eyes are closed.\n\nYour phone can be unlocked by someone who looks a lot like you, say, an identical sibling.</string>

    <!-- Dialog title shown when the user removes an enrollment [CHAR LIMIT=35] -->