cros_next: Apply dynamic color to window control buttons

Apply dynamic colors to the window control button on window frame header which has adopted dynamic color. For window frame headers (ARC++, Crostini, PWA...) which haven't adopted the dynamic color, the button's
color is still calculated on the header's background color. Here's one
pager doc: go/apply-dynamic-color-to-window-control-buttons-one-pager

Bug: b/288494696
Change-Id: I75c74860a1ce71f3c0340aeb57dcd42457b48b78
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4659684
Commit-Queue: Connie Xu <conniekxu@chromium.org>
Reviewed-by: Sammie Quon <sammiequon@chromium.org>
Reviewed-by: Andre Le <leandre@chromium.org>
Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Reviewed-by: Toshiki Kikuchi <toshikikikuchi@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1174288}