Revert "Migrate PackagerConnectionSettings.java to Kotlin (facebook#4…

…5800)"

This reverts commit ea78d68.

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 final class com/facebook/react/packagerconnection/PackagerConnectionSettings {
+public class com/facebook/react/packagerconnection/PackagerConnectionSettings {
 	public fun <init> (Landroid/content/Context;)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 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 class com/facebook/react/packagerconnection/ReconnectingWebSocket : okhttp3/WebSocketListener {

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

@@ -0,0 +1,76 @@
+/*
+ * 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 android.preference.PreferenceManager;
+import android.text.TextUtils;
+import androidx.annotation.Nullable;
+import com.facebook.common.logging.FLog;
+import com.facebook.infer.annotation.Assertions;
+import com.facebook.infer.annotation.Nullsafe;
+import com.facebook.react.modules.systeminfo.AndroidInfoHelpers;
+import java.util.HashMap;
+import java.util.Map;
+
+@Nullsafe(Nullsafe.Mode.LOCAL)
+public class PackagerConnectionSettings {
+  private static final String TAG = PackagerConnectionSettings.class.getSimpleName();
+  private static final String PREFS_DEBUG_SERVER_HOST_KEY = "debug_http_host";
+
+  private final SharedPreferences mPreferences;
+  private final String mPackageName;
+  private final Context mAppContext;
+  private final Map<String, String> mAdditionalOptionsForPackager = new HashMap<>();
+
+  public PackagerConnectionSettings(Context applicationContext) {
+    mPreferences = PreferenceManager.getDefaultSharedPreferences(applicationContext);
+    mPackageName = applicationContext.getPackageName();
+    mAppContext = applicationContext;
+  }
+
+  public String getDebugServerHost() {
+    // Check host setting first. If empty try to detect emulator type and use default
+    // hostname for those
+    String hostFromSettings = mPreferences.getString(PREFS_DEBUG_SERVER_HOST_KEY, null);
+
+    if (!TextUtils.isEmpty(hostFromSettings)) {
+      return Assertions.assertNotNull(hostFromSettings);
+    }
+
+    String host = AndroidInfoHelpers.getServerHost(mAppContext);
+
+    if (host.equals(AndroidInfoHelpers.DEVICE_LOCALHOST)) {
+      FLog.w(
+          TAG,
+          "You seem to be running on device. Run '"
+              + AndroidInfoHelpers.getAdbReverseTcpCommand(mAppContext)
+              + "' "
+              + "to forward the debug server's port to the device.");
+    }
+
+    return host;
+  }
+
+  public void setDebugServerHost(String host) {
+    mPreferences.edit().putString(PREFS_DEBUG_SERVER_HOST_KEY, host).apply();
+  }
+
+  public @Nullable String getPackageName() {
+    return mPackageName;
+  }
+
+  public void setAdditionalOptionForPackager(String key, String value) {
+    mAdditionalOptionsForPackager.put(key, value);
+  }
+
+  public Map<String, String> getAdditionalOptionsForPackager() {
+    return mAdditionalOptionsForPackager;
+  }
+}