fix:updated account name and length for dapp connections

[NidhiKJha]

This PR is to:

1. Show correct account names when dapp tries to connect with MM and account is imported
2. Show correct length of accounts when more than one account is connected

Related issues

Fixes: 3685-planning
#28312

Manual testing steps

1. Import an account in MM
2. Initiate connection request from Dapp, check correct name of account is shown on connections page
3. After connecting, select more than account, check length of accounts shown is correct

Screenshots/Recordings

Before

383819102-d87758b9-b17e-47e9-b88f-bf5740ea1e95.mov

After

Screen.Recording.2024-11-26.at.12.58.10.PM.mov

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 [940226f]

• 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 (2037 ± 111 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	1803	2983	2042	234	113
		domContentLoaded	1793	2939	1998	233	112
		load	1802	2961	2037	230	111
		domInteractive	28	87	52	19	9
		backgroundConnect	10	84	32	24	11
		firstReactRender	17	87	52	26	12
		getState	7	76	29	23	11
		initialActions	0	1	0	0	0
		loadScripts	1279	2149	1481	178	85
		setupStore	7	59	16	15	7
		uiStartup	2043	3318	2289	262	126

Bundle size diffs

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