Disable Kotlin codegen for RoomAndroidGradlePluginTest

The KSP test path validates the javac compile task that only occurs when Room is generating Java. The default codegen for KSP was updated in aosp/3041994 and broke the test so we configure the project to keep generating Java until it is revisited.

Bug: 335276662
Test: ./gradlew :room:room-gradle-plugin:test
Change-Id: I469a2a27908371ff6e3c4cba805984ef9e54880a
diff --git a/room/room-gradle-plugin/src/test/java/androidx/room/gradle/RoomAndroidGradlePluginTest.kt b/room/room-gradle-plugin/src/test/java/androidx/room/gradle/RoomAndroidGradlePluginTest.kt
index 02b6c11..cc0132e 100644
--- a/room/room-gradle-plugin/src/test/java/androidx/room/gradle/RoomAndroidGradlePluginTest.kt
+++ b/room/room-gradle-plugin/src/test/java/androidx/room/gradle/RoomAndroidGradlePluginTest.kt
@@ -133,6 +133,7 @@
             |
             |room {
             |${schemaDslLines.joinToString(separator = "\n")}
+            |    generateKotlin = false
             |}
             |
             """.trimMargin()