Build fixes

[bghgary]

This pull request updates several dependencies to newer versions and improves Objective-C ARC handling for unit tests on Apple platforms. The most important changes are grouped below.

Dependency Updates:

• Updated the AndroidExtensions submodule to use a newer commit hash, ensuring the latest features and fixes are included.
• Updated the CMakeExtensions submodule to a newer commit hash for improved build system capabilities.
• Updated the UrlLib submodule to a newer commit hash, likely for bug fixes or enhancements.

Apple Platform Build Improvements:

• Added a conditional call to enable_objc_arc(UnitTests) for Apple platforms, improving Objective-C ARC handling and removing the redundant XCODE_ATTRIBUTE_CLANG_ENABLE_OBJC_ARC property for iOS builds.

[Copilot]

Pull request overview

This PR updates pinned dependency revisions and adjusts the Apple-unit-test CMake target to enable Objective-C ARC via a shared helper rather than an iOS-only Xcode attribute.

Changes:

• Bumped the pinned FetchContent commit hashes for AndroidExtensions, CMakeExtensions, and UrlLib.
• Enabled Objective-C ARC for the UnitTests target on all Apple platforms via enable_objc_arc(UnitTests).
• Removed the redundant iOS-only XCODE_ATTRIBUTE_CLANG_ENABLE_OBJC_ARC target property.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
Tests/UnitTests/CMakeLists.txt	Enables ARC for the UnitTests target on Apple platforms and removes the iOS-specific Xcode ARC attribute.
CMakeLists.txt	Updates pinned dependency commit hashes for AndroidExtensions, CMakeExtensions, and UrlLib.

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