Update to Xcode 16.2 for ftl tests

[paulb777]

No description provided.

[gemini-code-assist]

Hello @paulb777, 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!

Summary of Changes

This pull request updates the Xcode version used for Firebase Test Lab (FTL) tests from 15.3 to 16.2. The change is a simple update to the scripts/build-for-testing.sh script, specifically modifying the xcode-select command to point to the new Xcode version.

Highlights

• Xcode Version Update: The primary change is updating the Xcode version used for FTL tests to the latest version, 16.2.
• Script Modification: The scripts/build-for-testing.sh script is modified to use Xcode 16.2.

Changelog

• scripts/build-for-testing.sh
  • Updated the xcode-select command to use Xcode 16.2 instead of 15.3.

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---

Xcode's update,
A new version takes its place,
Tests now proceed on.

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[gemini-code-assist]

Code Review

The pull request updates the Xcode version used for building and testing. This is a straightforward change, but it's important to ensure that the updated Xcode version is compatible with the project and dependencies.

Merge Readiness

The pull request updates the Xcode version used for building and testing. Since there are no critical or high severity issues, the pull request is likely ready to be merged after addressing the medium severity issue. I am unable to directly approve the pull request, and users should have others review and approve this code before merging.

[gemini-code-assist]

Consider using a variable for the Xcode path to improve maintainability. This way, if the Xcode version needs to be updated again, it can be done in one place. Also, it might be useful to check if the specified Xcode version exists before attempting to select it. This could prevent errors if the Xcode version is not installed.

Suggested change

	sudo xcode-select -s /Applications/Xcode_16.2.app/Contents/Developer
	XCODE_PATH="/Applications/Xcode_16.2.app/Contents/Developer"
	if [[ -d "$XCODE_PATH" ]]; then
	sudo xcode-select -s "$XCODE_PATH"
	else
	echo "Xcode version not found at $XCODE_PATH"
	exit 1
	fi

[ncooke3]

Thanks!