In the Issue 700625, Kefka device still uses the old region-related VPD fields (initial_locale, initial_timezone, and keyboard_layout). From M57, we should deprecate these fields and replace them by "region" field. Need to add a check in factory process to prevent this issue occur again.

Ref: https://bugs.chromium.org/p/chromium/issues/detail?id=700625#c42