fix(autocomplete): apply virtual focus to first item on IME composition input

[Lucas20000903]

Closes #10126

When typing into an Autocomplete with an IME (CJK languages such as Korean / Japanese / Chinese), the first matching item was not getting virtual focus, so pressing Enter would not select it.

The root cause is in useAutocomplete's onChange: it only calls focusFirstItem() when lastInputType.current === 'insertText'. IME composition does not emit insertText — it emits insertCompositionText (while composing) and insertFromComposition (on commit). Those input types fell through to the else if branch and triggered clearVirtualFocus(true), removing focus entirely.

This PR extends the forward-typing condition to also recognize the IME composition input types so virtual focus on the first item behaves the same as Latin text input.

✅ 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:

1. Open an Autocomplete / ComboBox story (e.g. Autocomplete with a filterable ListBox).
2. Switch your OS input to a CJK IME (Korean 2-set, Japanese, or Pinyin).
3. Type a query that matches an item.
4. Before: no item is virtually focused; pressing Enter selects nothing.
   After: the first matching item receives virtual focus and pressing Enter selects it — matching the existing Latin-input behavior.

🧢 Your Project:

Discovered while building an internal web app on top of react-aria Autocomplete (Korean IME).