fix: Replace `AvatarAccount` with `Identicon`

[OGPoyraz]

Description

This PR fixes icon issue on confirmations mentioned on https://github.com/MetaMask/metamask-extension/issues/28609

Related issues

Fixes: https://github.com/MetaMask/metamask-extension/issues/28609

Manual testing steps

1. Go to settings - select Blockies icons
2. Trigger a signature or contract interaction
3. See the addresses there are displayed in Blockies
4. Go to settings - select JazzIcons
5. Trigger a signature or contract interaction
6. See the addresses there are displayed in JazzIcons

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 [95fb76a]

• 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, 7
  • 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 (1785 ± 56 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	488	2050	1722	305	146
		domContentLoaded	1633	2034	1754	107	51
		load	1644	2059	1785	117	56
		domInteractive	15	119	37	24	12
		backgroundConnect	10	109	32	25	12
		firstReactRender	49	293	128	66	32
		getState	4	84	22	23	11
		initialActions	0	0	0	0	0
		loadScripts	1175	1565	1287	102	49
		setupStore	6	67	17	20	10
		uiStartup	1842	2474	2046	188	90

Bundle size diffs

• background: 0 Bytes (0.00%)
• ui: -121 Bytes (-0.00%)
• common: 0 Bytes (0.00%)