Part of #18714: Replacing deprecated constants with enums

[dhruvv173]

Explanation

• This PR is a part of Replace deprecated constants with enums #18714
• Made changes to
• ui/components/app/advanced-gas-fee-popover/advanced-gas-fee-defaults/advanced-gas-fee-defaults.js
• ui/components/app/modals/contract-details-modal/contract-details-modal.js
• ui/components/app/network-account-balance-header/network-account-balance-header.js

Screenshots/Screencaps

Before

Theres no story for advanced-gas-fee-defaults

contract-details-modal

network-account-balance-header

After

contract-details-modal

network-account-balance-header

Manual Testing Steps

• Pull this branch
• Run yarn storybook
• Check stories for contract-details-modal and network-account-balance-header

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.

[georgewrmarshall]

Nice catches! Please update with your suggestions and I can approve. Well done 💯

[codecov]

Codecov Report

Merging #19516 (f96f3e5) into develop (8eff1fc) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop   #19516      +/-   ##
===========================================
- Coverage    70.17%   70.16%   -0.01%     
===========================================
  Files          963      963              
  Lines        36980    36980              
  Branches      9510     9510              
===========================================
- Hits         25948    25946       -2     
- Misses       11032    11034       +2     

Impacted Files	Coverage Δ
...nced-gas-fee-defaults/advanced-gas-fee-defaults.js	100.00% <ø> (ø)
...s/contract-details-modal/contract-details-modal.js	68.09% <ø> (ø)
...t-balance-header/network-account-balance-header.js	87.50% <ø> (ø)

... and 2 files with indirect coverage changes

[georgewrmarshall]

LGTM! Thanks for your contribution @dhruvv173