Convert YogaConfigJNIFinalizer and YogaNodeJNIFinalizer to Kotlin (facebook#56021)

Summary:
X-link: facebook/yoga#1915

Pull Request resolved: facebook#56021

Changelog: [Internal]

Convert the last two Java finalizer classes in the yoga package to Kotlin, continuing the React Native Kotlinification effort. Both classes are simple JNI native memory cleanup wrappers (32 and 36 lines) that extend already-Kotlin base classes.

Changes:
- Convert `YogaConfigJNIFinalizer.java` → `.kt` (ReactAndroid + xplat/yoga copies)
- Convert `YogaNodeJNIFinalizer.java` → `.kt` (ReactAndroid + xplat/yoga copies)
- Remove `super.finalize()` calls (no-op in parent chain, and `Object.finalize()` is not directly callable from Kotlin)

The `:yoga` Buck target already has `language = "KOTLIN"` and globs both `*.java` and `*.kt`, so no build config changes are needed.

Differential Revision: D95872345

Author: andrewdacenko

packages/react-native/ReactAndroid/src/main/java/com/facebook/yoga/YogaConfigJNIFinalizer.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.yoga
+
+public class YogaConfigJNIFinalizer public constructor() : YogaConfigJNIBase() {
+
+  /*
+   * This is a valid use of finalize. No other mechanism is appropriate.
+   * YogaConfigJNIFinalizer exists specifically to release JNI-allocated native
+   * memory (via jni_YGConfigFreeJNI) when the Java object is garbage collected.
+   * This is the established pattern for JNI prevented leak classes in Yoga.
+   */
+  @Throws(Throwable::class)
+  protected fun finalize() {
+    freeNatives()
+  }
+
+  public fun freeNatives() {
+    if (nativePointer != 0L) {
+      val pointer = nativePointer
+      nativePointer = 0
+      YogaNative.jni_YGConfigFreeJNI(pointer)
+    }
+  }
+}

packages/react-native/ReactAndroid/src/main/java/com/facebook/yoga/YogaConfigJNIFinalizer.kt

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.yoga
+
+public class YogaNodeJNIFinalizer : YogaNodeJNIBase {
+  public constructor() : super()
+
+  public constructor(config: YogaConfig) : super(config)
+
+  /*
+   * This is a valid use of finalize. No other mechanism is appropriate.
+   * YogaNodeJNIFinalizer exists specifically to release JNI-allocated native
+   * memory (via jni_YGNodeFinalizeJNI) when the Java object is garbage collected.
+   * This is the established pattern for JNI prevented leak classes in Yoga.
+   */
+  @Throws(Throwable::class)
+  protected fun finalize() {
+    freeNatives()
+  }
+
+  public fun freeNatives() {
+    if (mNativePointer != 0L) {
+      val nativePointer = mNativePointer
+      mNativePointer = 0
+      YogaNative.jni_YGNodeFinalizeJNI(nativePointer)
+    }
+  }
+}