[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/testutils/build.gradle.kts b/packages/SettingsLib/Spa/testutils/build.gradle.kts
index 50243dc..cce8235 100644
--- a/packages/SettingsLib/Spa/testutils/build.gradle.kts
+++ b/packages/SettingsLib/Spa/testutils/build.gradle.kts
@@ -41,7 +41,7 @@
     api("androidx.arch.core:core-testing:2.2.0-alpha01")
     api("androidx.compose.ui:ui-test-junit4:$jetpackComposeVersion")
     api("androidx.lifecycle:lifecycle-runtime-testing")
-    api("org.mockito.kotlin:mockito-kotlin:5.1.0")
+    api("org.mockito.kotlin:mockito-kotlin:2.2.11")
     api("org.mockito:mockito-core") {
         version {
             strictly("2.28.2")