bmpblk: Update color palette and button icon styles

Update the bitmap colors in format.yaml and the sprite SVGs to match
the new firmware UI colors:
- Replace the grey_900, grey_500, and grey_200 aliases with GM3 dark
  theme color roles: surface_container (#1e1f20) for the background,
  and on_surface (#e3e3e3) for the text.
- Draw the error and error_url bitmaps on surface_container_high
  (#282a2c) to match the error box background.
- Add the error_icon style for ic_info, which is drawn in the error
  box, with background surface_container_high (#282a2c). Change the
  ic_info SVG fill to #a8c7fa.
- Remove the background colors of the button icons (ic_globe,
  ic_dropdown, button_icon, and button_arrow), and change their SVG
  fill to #ffffff, so that depthcharge can map them to the button
  colors at runtime.

BUG=b:551743258
BRANCH=none
TEST=LOCALES=en BOARD=asurada make
TAG=agy
CONV=4d411a1c-369f-4fd3-ac8a-7bd726afa3b5

Cq-Depend: chromium:8485906
Change-Id: I59c871c77f0c783090a2a988cf194847cf498e7c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/bmpblk/+/8482774
Reviewed-by: Chen-Tsung Hsieh <chentsung@chromium.org>
Commit-Queue: Yu-Ping Wu <yupingso@chromium.org>
Tested-by: Yu-Ping Wu <yupingso@chromium.org>
GitOrigin-RevId: 3360f466c9bc8d5d0c23c299c0872f1e833f92af