FW: camera sensor improvements:

- AR0234 improved AE smoothness, increased max gain to 400x (first 25.6x analog),
- OV9782 on RGB/CAM-A socket max FPS: 120 (previously was only for OV9282), also improves image quality in very bright light,
- OV9782/9282 minimum exposure time decreased: 20us -> 10us, helps in very bright light. TODO update tuning to make use of it, currently only possible to use with manual exposure

Author: alex-luxonis