[Spa] Upgrade Compose to 1.8.0-alpha06

Also,
- Upgrade AGP to 8.7.2
- Upgrade gradle to 8.11.1

Bug: 351975088
Flag: EXEMPT gradle only
Test: Gradle Sync
Test: Run Gallery
Change-Id: I68629e561f54cc9eef529a61f4c6fefc80eaaaa2