Tweak strings for traffic light face enrollment

Makes the following changes to help messages that will be shown during
traffic light face enrollment:
- Swaps messages for FACE_ACQUIRED_TOO_HIGH and FACE_ACQUIRED_TOO_LOW.
- Changes FACE_ACQUIRED_TILT_TOO_EXTREME message from "turn" to "tilt".

Test: Manually tested traffic light enrollment.

Bug: 179044580
Change-Id: I729cc1ac1909f3181b88d869358a4e9deb6761fd