[Spa] Upgrade AGP to 8.3.0

Also,
- Upgrade Gradle to 8.6
- Upgrade Compose to 1.7.0-alpha04
- Upgrade Compose Material3 to 1.3.0-alpha02
- Upgrade Navigation Compose to 2.8.0-alpha03

Bug: 318810660
Test: Gradle Sync
Test: Run Gallery
Change-Id: I984c35821d8f14bb81e56108ce90d64f60f14d1a