Separate the left and right parameters in parameter adjustment

In some devices, the left and right parameters cannot be properly aligned. I have a Quest Pro where the left eye squint is always more sensitive than the right eye squint. Even with calibration enabled, it only provides slight improvement. So, I hope to adjust the left and right parameters separately in parameter adjustment to improve the situation.

Start by locating the parameter adjustment entry point and the existing calibration path described in the issue. The work is done when left and right parameters can be adjusted independently and calibration no longer forces them to share the same sensitivity.

Written by the indexing model from the issue text.