fix (cherry-pick): incorrect standard swap gas fee estimation (#28127)

[matthewwalsh0]

Description

Cherry-pick of PR #28127 for release 12.6.

Related issues

Manual testing steps

Screenshots/Recordings

Before

After

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Extension Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[metamaskbot]

Builds ready [a6965ec]

• builds: chrome, firefox
• builds (beta): chrome
• builds (flask): chrome, firefox
• builds (MMI): chrome, firefox
• builds (test): chrome, firefox
• builds (test-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, 5, 6
  • common: 0, 1, 10, 11, 2, 3, 4, 5, 6, 7, 8, 9
  • content-script: 0
  • offscreen: 0
  • ui: 0, 1, 10, 11, 12, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (2202 ± 132 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	1844	2967	2197	288	138
		domContentLoaded	1833	2897	2147	245	118
		load	1847	2945	2202	274	132
		domInteractive	30	142	61	28	13
		backgroundConnect	12	272	48	62	30
		firstReactRender	101	282	132	40	19
		getState	7	147	39	38	18
		initialActions	0	1	0	0	0
		loadScripts	1300	2434	1627	236	113
		setupStore	13	122	34	34	16
		uiStartup	2073	3597	2531	415	199

Bundle size diffs [🚨 Warning! Bundle size has increased!]

• background: 3.1 KiB (0.06%)
• ui: 1.08 KiB (0.01%)
• common: 284 Bytes (0.00%)

[dbrans]

Thank you!

[metamaskbot]

No release label on PR. Adding release label release-12.6.0 on PR, as PR was cherry-picked in branch 12.6.0.