Revert "Revert "Migrate PackagerConnectionSettings.java to Kotlin (fa…

…cebook#45800)""

This reverts commit c6a3f5b.

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

@@ -3781,13 +3781,13 @@ public abstract class com/facebook/react/packagerconnection/NotificationOnlyHand
 	public final fun onRequest (Ljava/lang/Object;Lcom/facebook/react/packagerconnection/Responder;)V
 }
 
-public class com/facebook/react/packagerconnection/PackagerConnectionSettings {
+public final class com/facebook/react/packagerconnection/PackagerConnectionSettings {
 	public fun <init> (Landroid/content/Context;)V
-	public fun getAdditionalOptionsForPackager ()Ljava/util/Map;
-	public fun getDebugServerHost ()Ljava/lang/String;
-	public fun getPackageName ()Ljava/lang/String;
-	public fun setAdditionalOptionForPackager (Ljava/lang/String;Ljava/lang/String;)V
-	public fun setDebugServerHost (Ljava/lang/String;)V
+	public final fun getAdditionalOptionsForPackager ()Ljava/util/Map;
+	public final fun getDebugServerHost ()Ljava/lang/String;
+	public final fun getPackageName ()Ljava/lang/String;
+	public final fun setAdditionalOptionForPackager (Ljava/lang/String;Ljava/lang/String;)V
+	public final fun setDebugServerHost (Ljava/lang/String;)V
 }
 
 public final class com/facebook/react/packagerconnection/ReconnectingWebSocket : okhttp3/WebSocketListener {

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

@@ -0,0 +1,53 @@
+/*
+ * 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.packagerconnection
+
+import android.content.Context
+import android.content.SharedPreferences
+import androidx.preference.PreferenceManager
+import com.facebook.common.logging.FLog
+import com.facebook.react.modules.systeminfo.AndroidInfoHelpers
+
+public class PackagerConnectionSettings(private val appContext: Context) {
+  private val preferences: SharedPreferences =
+      PreferenceManager.getDefaultSharedPreferences(appContext)
+  public val packageName: String = appContext.packageName
+  private val _additionalOptionsForPackager: MutableMap<String, String> = mutableMapOf()
+
+  public var debugServerHost: String
+    get() {
+      // Check host setting first. If empty try to detect emulator type and use default
+      // hostname for those
+      val hostFromSettings = preferences.getString(PREFS_DEBUG_SERVER_HOST_KEY, null)
+      if (hostFromSettings?.isNotEmpty() == true) {
+        return hostFromSettings
+      }
+      val host = AndroidInfoHelpers.getServerHost(appContext)
+      if (host == AndroidInfoHelpers.DEVICE_LOCALHOST) {
+        FLog.w(
+            TAG,
+            "You seem to be running on device. Run '${AndroidInfoHelpers.getAdbReverseTcpCommand(appContext)}' to forward the debug server's port to the device.")
+      }
+      return host
+    }
+    set(host) {
+      preferences.edit().putString(PREFS_DEBUG_SERVER_HOST_KEY, host).apply()
+    }
+
+  public fun setAdditionalOptionForPackager(key: String, value: String) {
+    _additionalOptionsForPackager[key] = value
+  }
+
+  public val additionalOptionsForPackager: Map<String, String>
+    get() = _additionalOptionsForPackager
+
+  private companion object {
+    private val TAG = PackagerConnectionSettings::class.java.simpleName
+    private const val PREFS_DEBUG_SERVER_HOST_KEY = "debug_http_host"
+  }
+}