[Spa] Fix build warnings

Also,
 - Upgrade gradle to 8.3
 - Upgrade AGP to 8.1.1

Bug: 289155281
Test: Gradle Sync
Test: unit test
Change-Id: Id9e966f5b392276509a7a917598f70c6702f9061
diff --git a/packages/SettingsLib/Spa/spa/build.gradle.kts b/packages/SettingsLib/Spa/spa/build.gradle.kts
index 84198de..b810511 100644
--- a/packages/SettingsLib/Spa/spa/build.gradle.kts
+++ b/packages/SettingsLib/Spa/spa/build.gradle.kts
@@ -63,7 +63,7 @@
     api("androidx.compose.ui:ui-tooling-preview:$jetpackComposeVersion")
     api("androidx.lifecycle:lifecycle-livedata-ktx")
     api("androidx.lifecycle:lifecycle-runtime-compose")
-    api("androidx.navigation:navigation-compose:2.7.0-rc01")
+    api("androidx.navigation:navigation-compose:2.7.1")
     api("com.github.PhilJay:MPAndroidChart:v3.1.0-alpha")
     api("com.google.android.material:material:1.7.0-alpha03")
     debugApi("androidx.compose.ui:ui-tooling:$jetpackComposeVersion")