[PM-40662] Autofill doesn't show results for IPv6 literals

### Steps To Reproduce

1. Create a login item with an URI of an IPv6 address
2. Connect to a webpage with that IP address directly (e.g. your router's management page, something like https://[2001:db8::1])
3. Try to use autofill

### Expected Result

Items with the URI as the IPv6 literal show up

### Actual Result

They don't!

### Screenshots or Videos

### Additional Context

_No response_

### Build Version

2026.6.1

### What server are you connecting to?

US

### Self-host Server Version

_No response_

### Environment Details

- Device: moto g84, Android 16 QPR2 (CalyxOS 7)

### Issue Tracking Info

- [x] I understand that work is tracked outside of Github. A PR will be linked to this issue should one be opened to address it, but Bitwarden doesn't use fields like "assigned", "milestone", or "project" to track progress.

Start by reproducing the issue in the Android autofill flow with a bracketed IPv6 URL, then trace how the autofill URI is matched against saved login items. Done means a login item whose URI is an IPv6 literal appears when visiting the same address, with a regression check covering the case.

Written by the indexing model from the issue text.