* Updated minimum brightness calculation from 4/2047 to 4/4095
to align with display DTSI's max level (qcom,mdss-brightness-min-level = 1,
qcom,mdss-brightness-max-level = 4095).
* Synced screenBrightnessRamp with Oplus SM8650.
* screenBrightnessMap is preferred as it supports only floating-point values.
* Calculated High Brightness Mode (HBM) transition point as 2047/(4095-4).
The transition lux is also obtained from OplusSmartBrightnessController.
* Removed some overlays so as to prefer the defaults.
* Update auto brightness overlays from stock display dumpsys under
OplusSmartBrightnessController.
Change-Id: I0b2513be866728f3ddf93f7fbe296d78d862c813
