UI: Set White color to TransportModeBadge and TransportModeIcon

[ksharma-xyz]

TL;DR

Added LocalTextColor provider to transport mode components to ensure consistent text coloring.

What changed?

• Added CompositionLocalProvider for LocalTextColor in TransportModeBadge and TransportModeIcon
• Set text color to white for both components through the composition local
• Maintained existing content alpha settings

How to test?

1. Navigate to any screen displaying transport mode badges or icons
2. Verify that text appears in white color
3. Confirm that the text remains visible against the component backgrounds
4. Check that the styling is consistent across different transport modes

Why make this change?

To establish a consistent text color implementation across transport-related components using Compose's composition locals, rather than setting the color directly on individual Text components. This approach provides better maintainability and ensures color consistency throughout the application.

[ksharma-xyz]

• UI: Set White color to TransportModeBadge and TransportModeIcon #591 👈 (View in Graphite)
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