[Slider] Separate control over active and inactive track heighs

Nobody has claimed this yet.

Material specification allows to control active and inactive track heights separately – https://material.io/components/sliders#specs. I'd like to see this in the `Slider` class as well.

https://github.com/material-components/material-components-android/blob/0e5c3932cb790ef40a632bea69fc9b2035552345/lib/java/com/google/android/material/slider/BaseSlider.java#L1147-L1153

https://github.com/material-components/material-components-android/blob/0e5c3932cb790ef40a632bea69fc9b2035552345/lib/java/com/google/android/material/slider/BaseSlider.java#L2051-L2056

I think the optimal solution would be to add two additional properties – `inactiveTrackHeight` and `activeTrackHeight`. They would have separate getters and setters. Current `trackHeight` could control both of them. Optionally it could be deprecated.

Start by reading the Slider implementation and the referenced sections of BaseSlider.java to understand the existing trackHeight behavior. Add separate activeTrackHeight and inactiveTrackHeight getters and setters while preserving trackHeight control over both; done means the two track segments can be configured independently.

Written by the indexing model from the issue text.