fix(wallet): Swap Provider Icons

[Douglashdaniel]

Description

• Fixes a bug where the Auto Brave Icon was missing when you open the Select Provider dropdown
• Fixes a bug where the Li.Fi icon was broken when you select Li.Fi as an option

Resolves brave/brave-browser#40881

Submitter Checklist:

• I confirm that no security/privacy review is needed and no other type of reviews are needed, or that I have requested them
• There is a ticket for my issue
• Used Github auto-closing keywords in the PR description above
• Wrote a good PR/commit description
• Squashed any review feedback or "fixup" commits before merge, so that history is a record of what happened in the repo, not your PR
• Added appropriate labels (QA/Yes or QA/No; release-notes/include or release-notes/exclude; OS/...) to the associated issue
• Checked the PR locally:
  • npm run test -- brave_browser_tests, npm run test -- brave_unit_tests wiki
  • npm run presubmit wiki, npm run gn_check, npm run tslint
• Ran git rebase master (if needed)

Reviewer Checklist:

• A security review is not needed, or a link to one is included in the PR description
• New files have MPL-2.0 license header
• Adequate test coverage exists to prevent regressions
• Major classes, functions and non-trivial code blocks are well-commented
• Changes in component dependencies are properly reflected in gn
• Code follows the style guide
• Test plan is specified in PR before merging

After-merge Checklist:

• The associated issue milestone is set to the smallest version that the
  changes has landed on
• All relevant documentation has been updated, for instance:
  • https://github.com/brave/brave-browser/wiki/Deviations-from-Chromium-(features-we-disable-or-remove)
  • https://github.com/brave/brave-browser/wiki/Proxy-redirected-URLs
  • https://github.com/brave/brave-browser/wiki/Fingerprinting-Protections
  • https://github.com/brave/brave-browser/wiki/Brave%E2%80%99s-Use-of-Referral-Codes
  • https://github.com/brave/brave-browser/wiki/Web-Compatibility-Exceptions-in-Brave
  • https://github.com/brave/brave-browser/wiki/QA-Guide
  • https://github.com/brave/brave-browser/wiki/P3A

Test Plan:

1. Open the Wallet and navigate to the Swap screen
2. Open the Select Provider dropdown, the Brave icon should not be missing for Auto
3. Select Li.Fi as the provider, the Li.Fi icon should not be broken after selection

Before:

Screen.Recording.mov

After:

Screen.Recording.1.mov

[onyb]

++

[brave-builds]

A Storybook has been deployed to preview UI for the latest push

[brave-builds]

A Storybook has been deployed to preview UI for the latest push

[brave-builds]

A Storybook has been deployed to preview UI for the latest push

[kjozwiak]

Verification PASSED on Win 11 x64 using the following build(s):

Brave | 1.71.61 Chromium: 128.0.6613.120 (Official Build) nightly (64-bit)
-- | --
Revision | 97203b285c3fd120a2714727789be3b6ea8b91e6
OS | Windows 11 Version 23H2 (Build 22631.4112)

Using the STR/Cases outlined via #25451 (comment), ensured that the icons were being displayed under brave://wallet/swap under Auto as per the following:

Recording.2024-09-08.210400.mp4