How to set the default screen brightness value to automatic adjustment after booting

After the first power-on, Settings > Display > Automatic Brightness Adjustment is checked by default.
Revise
alps\frameworks\base\packages\SettingsProvider\res\values\
Inside
<bool name="def_screen_brightness_automatic_mode">false</bool>
Change to
<bool name="def_screen_brightness_automatic_mode">true</bool>
Just do it.