UI: use sentence case for browser options

[harshsomankar123-tech]

Purpose / Description

The Browser Options dialog contains text using inconsistent capitalization (e.g. title case instead of sentence case), which differs from surrounding UI text and affects visual consistency.

This PR aligns Browser Options strings with the established sentence case style used across the app.

Fixes #15760

Approach

• Identified strings used directly by the Browser Options dialog
• Updated only those strings to sentence case
• Left adjacent and unrelated strings unchanged to avoid expanding scope

How Has This Been Tested?

• Manually verified the Browser Options dialog UI
• Confirmed no other screens or features are affected

Checklist

• Descriptive commit message with a short title
• Self-reviewed the changes
• Scope limited strictly to Browser Options
• No functional or behavioral changes
• UI change verified manually

[github-actions]

Important

Maintainers: This PR contains Strings changes

1. Sync Translations before merging this PR and wait for the action to complete
2. Review and merge the auto-generated PR in order to sync all user-submitted translations
3. Sync Translations again and merge the PR so the huge automated string changes caused by merging this PR are by themselves and easy to review

[david-allison]

This seems fine, but I'm not sure I understand the scope, this is well outside just the scope of Browser Options, but there's some adjacent strings which haven't been handled in the files which are edited.

[harshsomankar123-tech]

Thanks for the review!
The intent here is limited to Browser Options. let me know if you’d like any scope adjustments.

[david-allison]

Please fill out the PR template

https://github.com/ankidroid/Anki-Android/blob/main/.github/pull_request_template.md

[harshsomankar123-tech]

Thanks!
I’ve updated the PR description using the template and kept the scope limited to Browser Options only.