Remove intro text from Face Unlock Settings screen

    <!-- 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_top_intro">Use Face Unlock to unlock your device, sign in to apps, and confirm payments.</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 your face to unlock your phone or for authentication in apps, like when you sign in or approve a purchase.\n\nKeep in mind:\nYou can only have one face set up at a time. To add another face, delete the current one.\n\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, like 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 your face to unlock your phone or for authentication in apps, like when you sign in or approve a purchase.\n\nKeep in mind:\nYou can only have one face set up at a time. To add another face, delete the current one.\n\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, like an identical sibling.</string>

    xmlns:settings="http://schemas.android.com/apk/res-auto"

    android:title="@string/security_settings_face_preference_title">

    <com.android.settingslib.widget.TopIntroPreference

        android:title="@string/security_settings_face_settings_top_intro"

        settings:searchable="false"/>

    <PreferenceCategory

        android:key="security_settings_face_unlock_category"

        android:title="@string/security_settings_face_settings_use_face_category"