Wallpapers: Apply Wallpaper.cardColor to Homepage backplating

[MozillaNoah]

Dependencies

• https://github.com/mozilla-mobile/fenix/issues/26423
• https://github.com/mozilla-mobile/fenix/issues/26519
• https://github.com/mozilla-mobile/fenix/issues/26796
• https://github.com/mozilla-mobile/fenix/issues/26797
• https://github.com/mozilla-mobile/fenix/issues/27094
• https://github.com/mozilla-mobile/fenix/issues/27095

The backplates on the homepage should be driven by the colors returned from the wallpaper metadata JSON. There will be a color to be used for the light theme and a color for the dark theme.

There is special logic for the following components

• Customize homepage button receives the same card color treatment when a wallpaper is selected
• Pocket categories
  • Dark
    • Selected is dark
    • Unselected is light
  • Light
    • Selected is light
    • Unselected is dark
• Recent synced tab button
  • If there is a wallpaper, use Layer1. If there isn't a wallpaper, use the default color.

If a color does not exist for a wallpaper (null from the metadata), the default colors will be used.

Figma

┆Issue is synchronized with this Jira Task