Create a color theme for the PreviewScreen UI components

The preview screen UI components are much higher contrast than the standard [Material color scheme](https://m3.material.io/styles/color/static/baseline). Currently we don't apply most of the colors based on a color scheme like we have in [ToggleButton](https://github.com/google/jetpack-camera-app/blob/ab75926866baecb52bd1a32c6cb93aa63e27ce4b/feature/preview/src/main/java/com/google/jetpackcamera/feature/preview/ui/PreviewScreenComponents.kt#L507), which uses the MaterialTheme.

We should define and use a color scheme for the Preview Screen components which use the white / yellow colors we are using now.

We may also want to fix this color scheme to use dark mode for highest contrast.