[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
diff --git a/packages/SettingsLib/Spa/build.gradle.kts b/packages/SettingsLib/Spa/build.gradle.kts
index 1cc2867..0b7a568 100644
--- a/packages/SettingsLib/Spa/build.gradle.kts
+++ b/packages/SettingsLib/Spa/build.gradle.kts
@@ -26,7 +26,7 @@
 }
 
 allprojects {
-    extra["jetpackComposeVersion"] = "1.6.0-alpha02"
+    extra["jetpackComposeVersion"] = "1.6.0-alpha07"
 }
 
 subprojects {