chore: integrate MultichainBalancesController

[gantunesr]

Description

This PR changes the current non-EVM BalancesController for the new MultichainBalancesController that is now included in the version 46.0.0 of the @metamask/assets-controllers.

Related issues

Fixes: https://github.com/MetaMask/accounts-planning/issues/723
Fixes: #29678

Manual testing steps

1. Start the Flask wallet
2. Enable the Bitcoin experimental feature
3. Add a Bitcoin account (mainnet or testnet)
4. Check that the balance is correct
5. Make a transaction (send/receive)
6. Check that the balance is correct after 10/15 min

Screenshots/Recordings

Not applicable

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.

[gantunesr]

@metamaskbot update-policies

[metamaskbot]

Policies updated.
👀 Please review the diff for suspicious new powers.

🧠 Learn how: https://lavamoat.github.io/guides/policy-diff/#what-to-look-for-when-reviewing-a-policy-diff

[ccharly]

LGTM and tested manually too!

[gantunesr]

@metamaskbot update-policies

[socket-security]

Updated dependencies detected. Learn more about Socket for GitHub ↗︎

Package	New capabilities	Transitives	Size	Publisher
npm/@metamask/[email protected] 🔁 npm/@metamask/[email protected]	None	+1	2.75 MB	metamaskbot

View full report↗︎

[metamaskbot]

Policies updated.
👀 Please review the diff for suspicious new powers.

🧠 Learn how: https://lavamoat.github.io/guides/policy-diff/#what-to-look-for-when-reviewing-a-policy-diff

[metamaskbot]

Builds ready [95b26c5]

• builds: chrome, firefox
• builds (flask): chrome, firefox
• builds (MMI): chrome
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6, 7
  • common: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
  • ui: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
  • content-script: 0
  • offscreen: 0

Page Load Metrics (1649 ± 42 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	257	1841	1518	412	198
		domContentLoaded	1409	1826	1632	86	41
		load	1417	1842	1649	87	42
		domInteractive	25	73	42	14	7
		backgroundConnect	6	50	19	16	8
		firstReactRender	16	100	37	28	13
		getState	5	56	12	14	7
		initialActions	0	1	0	0	0
		loadScripts	1016	1363	1206	81	39
		setupStore	6	61	12	15	7
		uiStartup	1683	2453	1928	196	94

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

• background: -33.5 KiB (-0.56%)
• ui: 307 Bytes (0.00%)
• common: 79.39 KiB (0.91%)