Migrate Spa to Kotlin DSL

Also the following changes,
- Upgrade gradle to 8.1
- Upgrade AGP to 8.0.2
- Enable Version Catalog
- Set target SDK to 34

Bug: 284913888
Test: Gradle Sync
Test: Run Gallery
Test: Unit test
Change-Id: I08e1f0517277f176d94c36b1cf18015c988d2a0d