Updating Hello Android XR for dec_xr_updates.

[amyZepp]

Updating Hello Android XR to latest Jetpack XR libraries

[gemini-code-assist]

Summary of Changes

Hello @amyZepp, 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 focuses on bringing the 'Hello Android XR' sample application up-to-date with the latest Jetpack XR libraries. This involves significant adjustments to how 3D model materials are defined and applied, reflecting API evolution within the XR framework. Beyond the core XR updates, the change also includes general dependency version bumps across the project and a minor refinement to a UI icon.

Highlights

• Jetpack XR Library Updates: The project has been updated to the latest versions of Jetpack XR libraries, including arcore, compose, and scenecore, reflecting recent API changes.
• 3D Model Material Handling Refactor: The BugdroidModel component was refactored to align with new XR library APIs for material creation and property setting, specifically for KhronosPbrMaterial.
• Search Icon Implementation Change: The search icon in the SearchBar component was changed from using Icons.Filled.Search to a custom XML vector drawable (search_24px.xml).
• Ambient Occlusion UI Removal: The user interface slider for adjusting ambient occlusion material properties was removed from BugdroidSliderControls.kt.
• Dependency Version Bumps: Numerous other dependencies in gradle/libs.versions.toml have been updated to their latest versions, including Android Gradle Plugin, Kotlin, Compose BOM, and Material.

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[gemini-code-assist]

Code Review

This pull request updates the project to use the latest Jetpack XR libraries. The dependency versions are updated and the code is adapted to the new APIs. The changes are generally good, but I've found a couple of issues in BugdroidModel.kt regarding the use of LaunchedEffect for setting material properties. One is a redundant call, and the other is a missing key that could lead to material properties not being applied correctly. My review includes suggestions to fix these issues.