device_config: Disable always screen on

- Some devices are keeping screen on and not turning off.
  Reported in some pixels and asus

Issue: https://www.reddit.com/r/LineageOS/comments/uw5d8p/screen_timeout_issue_on_pixels_on_android_12/
https://gitlab.com/LineageOS/issues/android/-/issues/4798

Change-Id: I1e2471928b47387f7e40adb81d3457bb58cc2755