Modify Vertex AI generateContent() snippet

[kkuan2011]

Per code review feedback (#686), change the function to be a suspend function and remove the coroutine scope.

[snippet-bot]

Here is the summary of changes.

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• misc/src/main/java/com/example/snippets/ai/VertexAiGeminiApi.kt:31, tag android_snippets_vertex_ai_generate_content

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• misc/src/main/java/com/example/snippets/ai/VertexAiGeminiApi.kt:33, tag android_snippets_vertex_ai_generate_content

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[gemini-code-assist]

Summary of Changes

Hello @kkuan2011, 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 refactors the generateText function in VertexAiGeminiApi.kt to improve its integration with Kotlin's coroutines and simplify its usage. The function is converted to a suspend function and the CoroutineScope parameter is removed.

Highlights

• Refactoring for Concurrency: The generateText function is now a suspend function, enabling better integration with Kotlin's coroutines.
• Scope Management: The function no longer requires a CoroutineScope parameter, simplifying its usage and reducing external dependencies.
• Code Clarity: The changes streamline the code within the generateText function, making it more readable and maintainable.

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[gemini-code-assist]

Code Review

This pull request correctly refactors the generateContent() snippet to be a suspend function and removes the explicit CoroutineScope, which is a great improvement for idiomatic Kotlin coroutine usage. My review includes one suggestion to further enhance code clarity by leveraging the class structure.

[gemini-code-assist]

Since generateText is a method within the VertexAiGeminiApi class which has a model property, it's more idiomatic for this method to use the instance's model property rather than accepting one as a parameter. This avoids shadowing the class property and makes the code clearer.

By removing the parameter, the method will implicitly use the model property from the class instance.

Suggested change

	suspend fun generateText(model: GenerativeModel) {
	suspend fun generateText() {