fix: Remove use of boolean value for metrics properties

[jpuri]

Description

Remove use of boolean value for metrics property.

Related issues

Fixes: https://github.com/MetaMask/MetaMask-planning/issues/3811

Manual testing steps

NA

Screenshots/Recordings

NA

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.

[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 [fd0211b]

• 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, 12, 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 (1744 ± 77 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	1582	2309	1747	162	78
		domContentLoaded	1489	2298	1711	165	79
		load	1582	2314	1744	160	77
		domInteractive	27	161	46	31	15
		backgroundConnect	10	78	33	22	10
		firstReactRender	16	102	41	30	14
		getState	6	81	22	24	12
		initialActions	0	1	0	0	0
		loadScripts	1060	1720	1270	136	65
		setupStore	7	74	23	22	11
		uiStartup	1773	2666	2051	256	123

Bundle size diffs

• background: 0 Bytes (0.00%)
• ui: 13 Bytes (0.00%)
• common: 0 Bytes (0.00%)