Update to September release of the XR libraries

[devbridie]

Tested on the emulator and on-device.

[gemini-code-assist]

Summary of Changes

Hello @devbridie, 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 upgrading the project's XR Compose libraries to the 1.0.0-alpha07 September release. The core changes involve adapting the codebase to the updated API, specifically by replacing deprecated spatial interaction modifiers with new policy-based parameters and updating event types. This ensures the application remains compatible with the latest XR development toolkit and benefits from any improvements or new features introduced in the release.

Highlights

• Library Version Update: The xr-compose library has been updated from version 1.0.0-alpha06 to 1.0.0-alpha07, aligning the project with the latest September release of the XR libraries.
• API Migration for Spatial Components: Existing usage of movable and resizable modifiers on SpatialPanel has been migrated to the new dragPolicy and resizePolicy parameters, reflecting changes in the updated XR Compose API.
• Type Renaming: The MoveEvent type used in onMove callbacks has been renamed to SpatialMoveEvent to match the new library conventions.
• Layout Adjustments: Minor layout adjustments were made, including changing SpatialAlignment.CenterRight to SpatialAlignment.CenterEnd and applying Modifier.fillMaxSize() to a Box composable in HomeScreenSpatial.kt.

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[gemini-code-assist]

Code Review

This pull request updates the XR Compose library to version 1.0.0-alpha07. The code changes correctly migrate from the deprecated movable and resizable modifiers to the new dragPolicy and resizePolicy parameters on SpatialPanel. The migration is well-executed. I've added a couple of suggestions to improve performance by memoizing policy object creation to avoid unnecessary allocations during recomposition.

[gemini-code-assist]

To improve performance, it's recommended to memoize the creation of MovePolicy and ResizePolicy using remember. This avoids creating new objects on every recomposition. Since onMove and minimumHeight can change, they should be used as keys for remember.

For example:

val dragPolicy = remember(onMove) { MovePolicy(onMove = onMove) }
val resizePolicy = remember(minimumHeight) {
    ResizePolicy(
        minimumSize = DpVolumeSize(0.dp, minimumHeight, 0.dp),
        shouldMaintainAspectRatio = true,
    )
}
SpatialPanel(
    // ...
    dragPolicy = dragPolicy,
    resizePolicy = resizePolicy,
)

[gemini-code-assist]

To optimize performance, you should wrap the creation of ResizePolicy and MovePolicy with remember. This prevents creating new policy objects on every recomposition.

For example:

val resizePolicy = remember { ResizePolicy(shouldMaintainAspectRatio = true) }
val dragPolicy = remember { MovePolicy() }
SpatialPanel(
    // ...
    resizePolicy = resizePolicy,
    dragPolicy = dragPolicy,
)