UX: Ensure multichain native token name is always shown

[darkwing]

Explanation

This PR ensures that the native token name is displayed regardless of the Settings -> Primary currency value. Previously it was showing "USD" for Ethereum, which is confusing.

• Fixes https://github.com/MetaMask/MetaMask-planning/issues/788

Screenshots/Screencaps

Before

After

Manual Testing Steps

• Flip the settings for Primary currency between Fiat and ETH, see Ethereum shown as the native token in the token list
• Switch to Polygon
• Flip the settings for Primary currency between Fiat and MATIC, see MATIC shown as the native token in the token list

Pre-merge author checklist

• I've clearly explained:
  • What problem this PR is solving
  • How this problem was solved
  • How reviewers can test my changes
• Sufficient automated test coverage has been added

Pre-merge reviewer checklist

• Manual testing (e.g. pull and build branch, run in browser, test code being changed)
• PR is linked to the appropriate GitHub issue
• IF this PR fixes a bug in the release milestone, add this PR to the release milestone

If further QA is required (e.g. new feature, complex testing steps, large refactor), add the Extension QA Board label.

In this case, a QA Engineer approval will be be required.

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[metamaskbot]

Builds ready [9dc0a44]

• builds: chrome, firefox
• builds (beta): chrome
• builds (flask): chrome, firefox
• build viz: Build System
• mv3: Background Module Init Stats
• mv3: UI Init Stats
• mv3: Module Load Stats
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• code coverage: Report
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4
  • common: 0, 1, 2, 3, 4, 5
  • content-script: 0
  • contentscript: contentscript
  • disable-console: disable-console
  • inpage: inpage
  • policy-load: policy-load
  • sentry-install: sentry-install
  • ui: 0, 1, 10, 11, 12, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (1665 ± 68 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	100	199	133	25	12
		domContentLoaded	1445	1919	1642	140	67
		load	1454	1932	1665	142	68
		domInteractive	1445	1919	1642	140	67

Bundle size diffs

• background: 0 bytes
• ui: -122 bytes
• common: 0 bytes

[codecov]

Codecov Report

Merging #19705 (9dc0a44) into develop (b7f8c82) will decrease coverage by 0.00%.
The diff coverage is 50.00%.

@@             Coverage Diff             @@
##           develop   #19705      +/-   ##
===========================================
- Coverage    70.79%   70.79%   -0.00%     
===========================================
  Files          988      988              
  Lines        38366    38362       -4     
  Branches     10042    10041       -1     
===========================================
- Hits         27161    27157       -4     
  Misses       11205    11205              

Impacted Files	Coverage Δ
ui/components/app/asset-list/asset-list.js	75.00% <50.00%> (-2.78%)	⬇️

[NidhiKJha]

LGTM

[vthomas13]

looks really good, thanks!