Converted RNTesterReactHostDelegate.java to RNTesterReactHostDelegate…

….kt (#38978)

Summary:
This PR converts RNTesterReactHostDelegate into Kotlin as requested in #38825 .

## Changelog:

[INTERNAL] [CHANGED] - Convert to RNTesterReactHostDelegate.java => Kotlin

Pull Request resolved: #38978

Test Plan:
Run yarn && yarn android
All tests should pass

Reviewed By: huntie, rshest

Differential Revision: D48598018

Pulled By: cortinico

fbshipit-source-id: f29eaa32c63835e090baf60bbde6c0c72b9041c2

packages/rn-tester/android/app/src/main/java/com/facebook/react/uiapp/RNTesterReactHostDelegate.kt

@@ -0,0 +1,124 @@
+/*
+ * 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.uiapp
+
+import android.content.Context
+import com.facebook.fbreact.specs.SampleLegacyModule
+import com.facebook.fbreact.specs.SampleTurboModule
+import com.facebook.react.JSEngineResolutionAlgorithm
+import com.facebook.react.ReactPackage
+import com.facebook.react.ReactPackageTurboModuleManagerDelegate
+import com.facebook.react.TurboReactPackage
+import com.facebook.react.bridge.JSBundleLoader
+import com.facebook.react.bridge.NativeModule
+import com.facebook.react.bridge.ReactApplicationContext
+import com.facebook.react.bridgeless.BindingsInstaller
+import com.facebook.react.bridgeless.JSCInstance
+import com.facebook.react.bridgeless.JSEngineInstance
+import com.facebook.react.bridgeless.ReactHostDelegate
+import com.facebook.react.bridgeless.ReactHostImpl
+import com.facebook.react.bridgeless.hermes.HermesInstance
+import com.facebook.react.common.annotations.UnstableReactNativeAPI
+import com.facebook.react.config.ReactFeatureFlags
+import com.facebook.react.defaults.DefaultTurboModuleManagerDelegate
+import com.facebook.react.fabric.ReactNativeConfig
+import com.facebook.react.module.model.ReactModuleInfo
+import com.facebook.react.module.model.ReactModuleInfoProvider
+import com.facebook.react.shell.MainReactPackage
+import com.facebook.react.turbomodule.core.TurboModuleManager
+import com.facebook.react.uiapp.component.MyLegacyViewManager
+import com.facebook.react.uiapp.component.MyNativeViewManager
+import com.facebook.react.uimanager.ViewManager
+
+@UnstableReactNativeAPI
+class RNTesterReactHostDelegate internal constructor(context: Context) : ReactHostDelegate {
+  var reactHost: ReactHostImpl? = null
+
+  override val jsMainModulePath: String = "js/RNTesterApp.android"
+
+  override val jsBundleLoader: JSBundleLoader =
+      JSBundleLoader.createAssetLoader(context, "assets://RNTesterApp.android.bundle", true)
+
+  @get:Synchronized override val bindingsInstaller: BindingsInstaller? = null
+
+  override val turboModuleManagerDelegateBuilder: ReactPackageTurboModuleManagerDelegate.Builder =
+      DefaultTurboModuleManagerDelegate.Builder()
+
+  override val jsEngineInstance: JSEngineInstance =
+      if (reactHost?.jsEngineResolutionAlgorithm == JSEngineResolutionAlgorithm.JSC) {
+        JSCInstance()
+      } else {
+        HermesInstance()
+      }
+
+  override fun handleInstanceException(error: Exception) {}
+
+  override fun getReactNativeConfig(turboModuleManager: TurboModuleManager): ReactNativeConfig =
+      ReactNativeConfig.DEFAULT_CONFIG
+
+  override val reactPackages: List<ReactPackage> by lazy {
+    listOf(
+        MainReactPackage(),
+        object : TurboReactPackage() {
+          override fun getModule(
+              name: String,
+              reactContext: ReactApplicationContext
+          ): NativeModule? =
+              when {
+                !ReactFeatureFlags.useTurboModules -> null
+                name == SampleTurboModule.NAME -> SampleTurboModule(reactContext)
+                name == SampleLegacyModule.NAME -> SampleLegacyModule(reactContext)
+                else -> null
+              }
+
+          // Note: Specialized annotation processor for @ReactModule isn't
+          // configured in OSS
+          // yet. For now, hardcode this information, though it's not necessary
+          // for most modules
+          override fun getReactModuleInfoProvider(): ReactModuleInfoProvider =
+              ReactModuleInfoProvider {
+                if (ReactFeatureFlags.useTurboModules) {
+                  mapOf(
+                      SampleTurboModule.NAME to
+                          ReactModuleInfo(
+                              SampleTurboModule.NAME,
+                              "SampleTurboModule",
+                              false, // canOverrideExistingModule
+                              false, // needsEagerInit
+                              true, // hasConstants
+                              false, // isCxxModule
+                              true // isTurboModule
+                              ),
+                      SampleLegacyModule.NAME to
+                          ReactModuleInfo(
+                              SampleLegacyModule.NAME,
+                              "SampleLegacyModule",
+                              false, // canOverrideExistingModule
+                              false, // needsEagerInit
+                              true, // hasConstants
+                              false, // isCxxModule
+                              false // isTurboModule
+                              ),
+                  )
+                } else {
+                  emptyMap()
+                }
+              }
+        },
+        object : ReactPackage {
+          override fun createNativeModules(
+              reactContext: ReactApplicationContext
+          ): List<NativeModule> = emptyList()
+
+          override fun createViewManagers(
+              reactContext: ReactApplicationContext
+          ): List<ViewManager<*, *>> =
+              listOf(MyNativeViewManager(), MyLegacyViewManager(reactContext))
+        })
+  }
+}