Update library versions and switch to using built-in Kotlin

[dturner]

What have I done and why
I have updated all the library and plugin dependencies in this project to use the latest stable versions. The only exception to this is the androidx.benchmark:benchmark-baseline-profile-gradle-plugin which I have updated to the latest alpha build because it fixes a compatibility issue with the new DSL introduced in Gradle 9.0.

I am doing this as a prerequisite step before refactoring, adding tests and migrating to Navigation 3.

Notably, I had to migrate the XR function ApplicationSubspace to Subspace. There's no documentation on this so I would appreciate it if someone from the XR team (@fuentespatrick maybe?) could confirm that this is correct.

[gemini-code-assist]

Summary of Changes

Hello @dturner, 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 a comprehensive update of the project's build environment and dependencies. The primary goal is to align the application with the latest Android SDK (API 36) and leverage newer versions of various libraries and tools, including Gradle, Android Gradle Plugin, Kotlin, and several AndroidX components. These updates ensure compatibility, incorporate the latest features, and potentially improve performance and stability. Additionally, minor build configuration adjustments and a refactoring in a spatial navigation component are included.

Highlights

• SDK Version Updates: The compileSdk and targetSdk versions across the project have been updated from 35 to 36, aligning with the latest Android API level.
• Dependency and Plugin Upgrades: Numerous dependencies and plugins have been upgraded to their latest stable or alpha versions, including Android Gradle Plugin (to 9.0.0), Compose BOM (to 2026.01.01), Hilt (to 2.59), Kotlin (to 2.3.0), KSP (to 2.3.4), and various AndroidX libraries like activity-compose, androidx-baselineprofile, core-splashscreen, lifecycle-runtime-ktx, material3-adaptive, media3, navigation-compose, window, xr, and xr-material3.
• Gradle Version Update: The Gradle distribution has been upgraded from 9.0.0 to 9.3.1.
• Build Configuration Refinements: The kotlin.android plugin alias was removed from the benchmark module's build.gradle.kts and commented out in the main jetstream module. Additionally, testOptions.managedDevices.devices was migrated to testOptions.managedDevices.localDevices in the benchmark module.
• Spatial Navigation Component Refactoring: The ApplicationSubspace class and its usage have been refactored to Subspace within the AppWithSpatialNavigation.kt file.

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Changelog

• AdaptiveJetStream/benchmark/build.gradle.kts
  • Removed alias(libs.plugins.kotlin.android) plugin.
  • Updated compileSdk from 35 to 36.
  • Updated targetSdk from 35 to 36.
  • Migrated testOptions.managedDevices.devices to testOptions.managedDevices.localDevices and simplified the create call.
• AdaptiveJetStream/gradle.properties
  • Ensured a newline character at the end of the file.
• AdaptiveJetStream/gradle/libs.versions.toml
  • Updated versions for activity-compose, android-gradle-plugin, android-test-plugin, androidx-baselineprofile, compose-bom, core-splashscreen, hilt-android, kotlin (renamed from kotlin-android), kotlinx-serialization, ksp, lifecycle-runtime-ktx, material3-adaptive, media3, navigation-compose, window, xr, and xr-material3.
  • Updated plugin references (kotlin-android, kotlin-serialization, compose-compiler) to use the new kotlin version reference.
• AdaptiveJetStream/gradle/wrapper/gradle-wrapper.properties
  • Upgraded Gradle distribution URL from gradle-9.0.0-bin.zip to gradle-9.3.1-bin.zip.
• AdaptiveJetStream/jetstream/build.gradle.kts
  • Commented out alias(libs.plugins.kotlin.android) plugin.
• AdaptiveJetStream/jetstream/src/main/AndroidManifest.xml
  • Updated tools:targetApi from 35 to 36.
  • Ensured a newline character at the end of the file.
• AdaptiveJetStream/jetstream/src/main/java/com/google/jetstream/presentation/app/withSpatialNavigation/AppWithSpatialNavigation.kt
  • Replaced import androidx.xr.compose.spatial.ApplicationSubspace with androidx.xr.compose.spatial.Subspace.
  • Replaced usage of ApplicationSubspace with Subspace.

Activity

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Code Review

This pull request primarily updates various dependencies, Android SDK versions, and Gradle versions across the project. It also includes an update to the XR Compose API usage, changing ApplicationSubspace to Subspace. These changes are generally good for keeping the project up-to-date with the latest libraries and platform features.