PrimaryBody and SecondaryBody colors for theme

Nadie ha tomado este issue todavía.

For my project I am currently writing a style for RadioButton that is styled as a ChoiceChip (https://material.io/components/chips#choice-chips)
Currently I have the following result:

As you can see the light theme is nice, but unfortunately the foreground color of the dark theme does not have enough contrast.
The problem is that for light theme I need the foreground to be PrimaryHueDarkBrush, but for the dark theme it must be PrimaryHueLightBrush. (Same for Secondary)
I currently think the best way to achieve this is by introducing a PrimaryBody and SecondaryBody color to the theme. The naming because it reacts in a similar way as currently the MaterialDesignBody color does.

I am willing to look into creating a PR with the necessary changes if you also see this as a good solution. Otherwise I hope you can come up with a better solution to fix this issue.

Comienza revisando el comportamiento existente de los colores del tema para PrimaryHueDarkBrush, PrimaryHueLightBrush, los colores secundarios y MaterialDesignBody. Traza cómo un RadioButton con estilo ChoiceChip selecciona los colores de primer plano en los temas claro y oscuro, y verifica después que el comportamiento propuesto de PrimaryBody y SecondaryBody proporcione suficiente contraste en ambos temas.

Escrito por el modelo de indexación a partir del texto del issue.