Fix wallpaper picker container colors (2/2)

Fix colors of containers on the wallpaper picker landing page, including
the background color of the overall landing page, the color of "Clock
color & size" button, clock carousel card color, color & wallpaper
quick switch section background colors, and section view icon container
color.

Bug: 281081163
Test: Manually verified, see bug
Change-Id: Ia4c296830a711ac8c02cb126bb41b40b00522a48