Update app_theme.dart

[dhuma1981]

Description

Part of flutter/flutter#170982

Refactored TabBarTheme to TabBarThemeData

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

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[tirth-patel-nc]

LGTM but the build will fail since the project isn't using Flutter 3.32.4. Might need additional work.

[Piinks]

Hi @dhuma1981 it looks like we aren't able to land this change as it is currently until we can make some updates in this repo. Thank you for contribution, for now I am going to close this PR while we see if we can make some updates. Thanks!