Ensure strings are consistent with HIDL documentation

    <string name="face_acquired_too_high">Move phone higher.</string>

    <!-- Message shown during face acquisition when the user is too low relatively to sensor [CHAR LIMIT=50] -->

    <string name="face_acquired_too_low">Move phone lower.</string>

    <!-- Message shown during face acquisition when the user is too right relatively to sensor [CHAR LIMIT=50] -->

    <string name="face_acquired_too_right">Move phone to the right.</string>

    <!-- Message shown during face acquisition when the user is too left relatively to sensor [CHAR LIMIT=50] -->

    <string name="face_acquired_too_left">Move phone to the left.</string>

    <!-- Message shown during face acquisition when only the right part of the user's face was detected [CHAR LIMIT=50] -->

    <string name="face_acquired_too_right">Move phone to the left.</string>

    <!-- Message shown during face acquisition when only the left part of the user's face was detected [CHAR LIMIT=50] -->

    <string name="face_acquired_too_left">Move phone to the right.</string>

    <!-- Message shown during face acquisition when the user is not front facing the sensor [CHAR LIMIT=50] -->

    <string name="face_acquired_poor_gaze">Look at the screen with your eyes open.</string>

    <!-- Message shown during face acquisition when the user is not detected [CHAR LIMIT=50] -->