Ensure Android Java and Kotlin compile to the same version

platform/android/java/app/settings.gradle

@@ -1,2 +1,15 @@
 // This is the root directory of the Godot custom build.
+pluginManagement {
+    apply from: 'config.gradle'
+
+    plugins {
+        id 'com.android.application' version versions.androidGradlePlugin
+        id 'org.jetbrains.kotlin.android' version versions.kotlinVersion
+    }
+    repositories {
+        gradlePluginPortal()
+        google()
+    }
+}
+
 include ':assetPacks:installTime'