Post visual update: Update tracker animation resources (#6579)

Task/Issue URL:
https://app.asana.com/1/137249556945/project/715106103902962/task/1210710337542502?focus=true

### Description

This PR updates the tracker animation resources after dark theme color
changes.

### Steps to test this PR

- [x] Set the dark mode on a device
- [x] Load some site with trackers/cookies
- [x] Verify the background around the shield in the tracker animation
matches the address bar color

### UI Changes

<img width="350" height="2400" alt="image"
src="https://github.com/user-attachments/assets/74d4526e-37e4-470e-adaf-db02ca62f669"
/>

Author: 0nko