fix: default network selection logic in connection flow

[adonesky1]

Fixes a small gap left by this fix

BEFORE:
https://github.com/user-attachments/assets/80d59554-83a6-47eb-906e-a06e99ae6158

AFTER:
https://github.com/user-attachments/assets/453a5bca-f975-4e9a-9028-2fa1f8980046

[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 [57b2f01]

• 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
  • content-script: 0
  • offscreen: 0

Page Load Metrics (1873 ± 49 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	255	2124	1711	483	232
		domContentLoaded	1674	2116	1846	98	47
		load	1689	2127	1873	101	49
		domInteractive	24	97	46	24	12
		backgroundConnect	9	78	30	22	10
		firstReactRender	17	100	48	29	14
		getState	5	83	21	22	10
		initialActions	0	1	0	0	0
		loadScripts	1218	1595	1350	96	46
		setupStore	7	84	24	25	12
		uiStartup	1947	2677	2204	185	89

Bundle size diffs

• background: 0 Bytes (0.00%)
• ui: 38 Bytes (0.00%)
• common: 0 Bytes (0.00%)