refactor: rewrite Inspector from Java to Kotlin (#50947)

Summary:
Rewrite of the Inspector class from Java to Kotlin in scope of #50513

## Changelog:
[ANDROID] [CHANGED] - Migrated Inspector to Kotlin

Pull Request resolved: #50947

Test Plan: Tested using RNTester app, on both old and new arch, and tested by navigating to multiple pages

Reviewed By: cortinico

Differential Revision: D73767386

Pulled By: javache

fbshipit-source-id: e0098568aa0ed9863503e206a88d3b171c8f9966

Author: Vin-Xi

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

@@ -737,20 +737,26 @@ public abstract class com/facebook/react/bridge/GuardedRunnable : java/lang/Runn
 	public abstract fun runGuarded ()V
 }
 
-public class com/facebook/react/bridge/Inspector {
-	public static fun connect (ILcom/facebook/react/bridge/Inspector$RemoteConnection;)Lcom/facebook/react/bridge/Inspector$LocalConnection;
-	public static fun getPages ()Ljava/util/List;
+public final class com/facebook/react/bridge/Inspector {
+	public static final field Companion Lcom/facebook/react/bridge/Inspector$Companion;
+	public static final fun connect (ILcom/facebook/react/bridge/Inspector$RemoteConnection;)Lcom/facebook/react/bridge/Inspector$LocalConnection;
+	public static final fun getPages ()Ljava/util/List;
 }
 
-public class com/facebook/react/bridge/Inspector$LocalConnection {
-	public fun disconnect ()V
-	public fun sendMessage (Ljava/lang/String;)V
+public final class com/facebook/react/bridge/Inspector$Companion {
+	public final fun connect (ILcom/facebook/react/bridge/Inspector$RemoteConnection;)Lcom/facebook/react/bridge/Inspector$LocalConnection;
+	public final fun getPages ()Ljava/util/List;
 }
 
-public class com/facebook/react/bridge/Inspector$Page {
-	public fun getId ()I
-	public fun getTitle ()Ljava/lang/String;
-	public fun getVM ()Ljava/lang/String;
+public final class com/facebook/react/bridge/Inspector$LocalConnection {
+	public final fun disconnect ()V
+	public final fun sendMessage (Ljava/lang/String;)V
+}
+
+public final class com/facebook/react/bridge/Inspector$Page {
+	public final fun getId ()I
+	public final fun getTitle ()Ljava/lang/String;
+	public final fun getVM ()Ljava/lang/String;
 	public fun toString ()Ljava/lang/String;
 }
 

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/bridge/Inspector.java

@@ -0,0 +1,78 @@
+/*
+ * 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.bridge
+
+import com.facebook.common.logging.FLog
+import com.facebook.jni.HybridData
+import com.facebook.proguard.annotations.DoNotStrip
+import com.facebook.react.common.ReactConstants
+
+@DoNotStrip
+public class Inspector
+private constructor(@Suppress("NoHungarianNotation") private val mHybridData: HybridData) {
+
+  private external fun getPagesNative(): Array<Page>
+
+  private external fun connectNative(pageId: Int, remote: RemoteConnection): LocalConnection?
+
+  @DoNotStrip
+  public class Page
+  private constructor(private val id: Int, private val title: String, private val vm: String) {
+    public fun getId(): Int = id
+
+    public fun getTitle(): String = title
+
+    public fun getVM(): String = vm
+
+    override fun toString(): String = "Page{id=$id, title='$title'}"
+  }
+
+  @DoNotStrip
+  public interface RemoteConnection {
+    @DoNotStrip public fun onMessage(message: String)
+
+    @DoNotStrip public fun onDisconnect()
+  }
+
+  @DoNotStrip
+  public class LocalConnection
+  private constructor(@Suppress("NoHungarianNotation") private val mHybridData: HybridData) {
+    public external fun sendMessage(message: String)
+
+    public external fun disconnect()
+  }
+
+  public companion object {
+    init {
+      BridgeSoLoader.staticInit()
+    }
+
+    @JvmStatic
+    public fun getPages(): List<Page> {
+      return try {
+        instance().getPagesNative().toList()
+      } catch (e: UnsatisfiedLinkError) {
+        FLog.e(ReactConstants.TAG, "Inspector doesn't work in open source yet", e)
+        emptyList()
+      }
+    }
+
+    @JvmStatic
+    public fun connect(pageId: Int, remote: RemoteConnection): LocalConnection {
+      return try {
+        instance().connectNative(pageId, remote)
+            ?: throw IllegalStateException("Can't open failed connection")
+      } catch (e: UnsatisfiedLinkError) {
+        FLog.e(ReactConstants.TAG, "Inspector doesn't work in open source yet", e)
+        throw RuntimeException(e)
+      }
+    }
+
+    @JvmStatic private external fun instance(): Inspector
+  }
+}