chore: update to flutter 3.16

[adryanev]

Description

What:

1. Update to flutter 3.16

How:

1. How do you change it?
2. If it is a breaking change, code refactor. Explain how others should migrate to the new API.

Why:

1. What is the reason for the change?
2. If it is a breaking change, code refactor. What justifies the change?

---

Type of Change

• ✨ New feature (non-breaking change which adds functionality)
• 🛠️ Bug fix (non-breaking change which fixes an issue)
• ❌ Breaking change (fix or feature that would cause existing functionality to change)
• 🧹 Code refactor
• ✅ Build configuration change
• 📝 Documentation
• 🗑️ Chore

Code Checklist

• Tested [test_documentation_video_link_here] or a screenshot.