Migrate MemoryPressureRouter to Kotlin

packages/react-native/ReactAndroid/api/ReactAndroid.api

@@ -58,14 +58,14 @@ public abstract class com/facebook/react/LazyReactPackage : com/facebook/react/R
 	public fun getViewManagers (Lcom/facebook/react/bridge/ReactApplicationContext;)Ljava/util/List;
 }
 
-public class com/facebook/react/MemoryPressureRouter : android/content/ComponentCallbacks2 {
+public final class com/facebook/react/MemoryPressureRouter : android/content/ComponentCallbacks2 {
 	public fun <init> (Landroid/content/Context;)V
-	public fun addMemoryPressureListener (Lcom/facebook/react/bridge/MemoryPressureListener;)V
-	public fun destroy (Landroid/content/Context;)V
+	public final fun addMemoryPressureListener (Lcom/facebook/react/bridge/MemoryPressureListener;)V
+	public final fun destroy (Landroid/content/Context;)V
 	public fun onConfigurationChanged (Landroid/content/res/Configuration;)V
 	public fun onLowMemory ()V
 	public fun onTrimMemory (I)V
-	public fun removeMemoryPressureListener (Lcom/facebook/react/bridge/MemoryPressureListener;)V
+	public final fun removeMemoryPressureListener (Lcom/facebook/react/bridge/MemoryPressureListener;)V
 }
 
 public final class com/facebook/react/NativeModuleRegistryBuilder {

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

@@ -0,0 +1,55 @@
+/*
+ * 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.react
+
+import android.content.ComponentCallbacks2
+import android.content.Context
+import android.content.res.Configuration
+import com.facebook.react.bridge.MemoryPressureListener
+import java.util.concurrent.CopyOnWriteArrayList
+
+/** Translates and routes memory pressure events. */
+public class MemoryPressureRouter(context: Context) : ComponentCallbacks2 {
+
+  private val listeners: CopyOnWriteArrayList<MemoryPressureListener> =
+      CopyOnWriteArrayList<MemoryPressureListener>()
+
+  init {
+    context.applicationContext.registerComponentCallbacks(this)
+  }
+
+  public fun destroy(context: Context): Unit {
+    context.applicationContext.unregisterComponentCallbacks(this)
+  }
+
+  /** Add a listener to be notified of memory pressure events. */
+  public fun addMemoryPressureListener(listener: MemoryPressureListener?): Unit {
+    if (!listeners.contains(listener)) {
+      listeners.add(listener)
+    }
+  }
+
+  /** Remove a listener previously added with [addMemoryPressureListener]. */
+  public fun removeMemoryPressureListener(listener: MemoryPressureListener?): Unit {
+    listeners.remove(listener)
+  }
+
+  override fun onTrimMemory(level: Int): Unit {
+    dispatchMemoryPressure(level)
+  }
+
+  override fun onConfigurationChanged(newConfig: Configuration): Unit = Unit
+
+  @Deprecated("onLowMemory is deprecated") override fun onLowMemory(): Unit = Unit
+
+  private fun dispatchMemoryPressure(level: Int) {
+    for (listener in listeners) {
+      listener.handleMemoryPressure(level)
+    }
+  }
+}