Add function ids to Live Todo sample.

[JolandaVerhoef]

Omitting them can cause problematic behavior in some of the backend models.

[gemini-code-assist]

Summary of Changes

Hello @JolandaVerhoef, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses potential problematic behavior in backend models by ensuring that function call identifiers are correctly propagated within the Live Todo sample application. By including the functionCall.id in all FunctionResponsePart instances, the system's interaction with generative AI models is made more robust and reliable, preventing issues that could arise from their omission.

Highlights

• Function ID Integration: The functionCall.id is now consistently passed as an argument to the FunctionResponsePart constructor across all handled functions (getTodo, addTodo, removeTodo, toggleTodo, and default cases) within the TodoScreenViewModel.
• Model Configuration Comments: Alternative Gemini Live model configurations (gemini-live-2.5-flash-preview and gemini-2.5-flash-native-audio-preview-09-2025) have been commented out in the TodoScreenViewModel.

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[gemini-code-assist]

Code Review

This pull request correctly adds the required functionCall.id to FunctionResponsePart constructions. My review includes a suggestion to refactor the handleFunctionCall method to improve its maintainability by reducing code duplication and to enhance its robustness by safely handling potentially missing function call arguments, which currently could lead to crashes.

[lethargicpanda]

Let's just remove them and link to the Firebase doc instead.