feat: #8007 ComboBox Autofocus on First List item when ListBox is filtered

[jsmitrah]

Closes #8007

✅ Pull Request Checklist:

• Included link to corresponding React Spectrum GitHub Issue.
• Added/updated unit tests and storybook for this change (for new code or code which already has tests).
• Filled out test instructions.
• Updated documentation (if it already exists for this component).
• Looked at the Accessibility Practices for this feature - Aria Practices

📝 Test Instructions:

• Use the ComboBox with multiple options.
• Search for a particular option; the option will be autofocused.

🧢 Your Project: