Fix contrast for yellow-on-yellow for network requests

Drive-by: use surface-color for error background, to match colors in
console

Previous CL: https://crrev.com/c/5908212

Bug: 372055494
Change-Id: I097b3bf6356967791cd19575f49e8d548ce4e723
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/5938191
Auto-Submit: Wolfgang Beyer <[email protected]>
Reviewed-by: Kateryna Prokopenko <[email protected]>
Commit-Queue: Kateryna Prokopenko <[email protected]>

Author: wolfib

front_end/panels/network/networkPanel.css

@@ -44,8 +44,8 @@
   --network-grid-navigation-color: var(--ref-palette-blue90);
   --network-grid-initiator-path-color: var(--ref-palette-green90);
   --network-grid-initiated-path-color: var(--ref-palette-error80);
-  --network-grid-focus-selected-color-has-error: var(--sys-color-error-container);
-  --network-grid-focus-selected-color-has-warning: var(--sys-color-yellow-container);
+  --network-grid-focus-selected-color-has-error: var(--sys-color-surface-error);
+  --network-grid-focus-selected-color-has-warning: var(--sys-color-surface-yellow);
   --network-grid-from-frame-color: var(--ref-palette-cyan95);
   --network-grid-is-product-color: var(--ref-palette-yellow95);
   --network-frame-divider-color: var(--ref-palette-yellow60);