feat: enable kotlin opt-outs for AGP9 adoption

Author: hurali97

template/android/gradle.properties

@@ -42,3 +42,8 @@ hermesEnabled=true
 # This allows your app to draw behind system bars for an immersive UI.
 # Note: Only works with ReactActivity and should not be used with custom Activity.
 edgeToEdgeEnabled=true
+
+# Opt out of built-in kotlin and new DSL behavior that ships with AGP 9.
+# Starting from AGP 10.x these opt outs will be removed.
+android.builtInKotlin=false
+android.newDsl=false