fix: Updated avatar favicon props for single account disconnect toast

[NidhiKJha]

This PR ensures that when a single account is disconnected from the Dapp via connections. It shouldn't break the page and disconnects smoothle

Related issues

Fixes: #23790

Manual testing steps

1. Run extension with Multichain flag
2. Connect a single account to uniswap
3. Go to connections page, click on disconnect account.
4. It should disconnect the account

Screenshots/Recordings

Before

Screen.Recording.2024-04-10.at.5.58.14.PM.mov

After

Screen.Recording.2024-04-10.at.5.56.59.PM.mov

Pre-merge author checklist

• I’ve followed MetaMask 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.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.51%. Comparing base (0e90c73) to head (e94d04c).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop   #23935   +/-   ##
========================================
  Coverage    67.51%   67.51%           
========================================
  Files         1244     1244           
  Lines        48732    48732           
  Branches     12726    12726           
========================================
  Hits         32898    32898           
  Misses       15834    15834           

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[metamaskbot]

Builds ready [e94d04c]

• 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, 2, 3, 4, 5, 6, 7, 8
  • content-script: 0
  • ui: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (493 ± 396 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	68	138	94	17	8
		domContentLoaded	9	50	25	12	6
		load	56	2352	493	825	396
		domInteractive	9	50	25	12	6

Bundle size diffs

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

[darkwing]

Tested and works wonderfully!