[Spa] Upgrade Compose to 1.6.0-alpha07

Also,
 - Upgrade Compose material3 to 1.2.0-alpha09
 - Upgrade AGP to 8.1.2
 - Upgrade Gradle to 8.4
 - Upgrade Truth to 1.1.5
 - Correct mockito-kotlin to 2.2.11

Bug: 303768224
Test: manual - with gallery
Change-Id: I0468f99eb9cf9bd2aeb5446dfc6a018254d93d5f