docs(README): call out JDK 17 requirement for AGP

[Qandil11]

New contributors often hit “AGP requires Java 17” when building samples.
This adds a short note under Requirements with a link to the official AGP docs.

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[gemini-code-assist]

Summary of Changes

Hello @Qandil11, 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 enhances the project's documentation by adding a crucial detail about the required Java Development Kit (JDK) version. The update directly addresses a frequent issue faced by new contributors, ensuring they have the necessary information to successfully build the project from the outset.

Highlights

• Documentation Update: Added a clear note to the README.md file specifying the JDK 17 requirement for building projects that use recent Android Gradle Plugin (AGP) versions.
• Developer Experience Improvement: This change aims to prevent common build errors encountered by new contributors, streamlining their setup process and reducing initial friction.

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[gemini-code-assist]

Code Review

This pull request adds a helpful note to the README.md file, clarifying the JDK 17 requirement for recent Android Gradle Plugin versions. This is a great addition for new contributors. I've included a couple of minor suggestions to improve the formatting and readability of the new section.

[gemini-code-assist]

For better readability and to provide more context, it's a good practice to use descriptive text for links instead of raw URLs.

Suggested change

	> See: https://developer.android.com/studio/releases/gradle-plugin#jdk-17
	> See the [AGP release notes](https://developer.android.com/studio/releases/gradle-plugin#jdk-17).

[gemini-code-assist]

This extra blank line can be removed to maintain consistent spacing throughout the document. One blank line is sufficient to separate sections.