Expose JSBundleLoader as parameter of DefaultReactHost (#47179)

Summary:
Pull Request resolved: #47179

In this diff I'm exposing the new parameter (JSBundleLoader) as parameter of DefaultReactHost.

changelog: [Android][Breaking] Added JSBundleLoader as parameter of DefaultReactHost

Reviewed By: cortinico

Differential Revision: D64381501

fbshipit-source-id: dd0d56441802f7db53c67c659bbcae63c4b1b613

Author: mdvacca

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

@@ -2059,8 +2059,8 @@ public class com/facebook/react/defaults/DefaultReactActivityDelegate : com/face
 public final class com/facebook/react/defaults/DefaultReactHost {
 	public static final field INSTANCE Lcom/facebook/react/defaults/DefaultReactHost;
 	public static final fun getDefaultReactHost (Landroid/content/Context;Lcom/facebook/react/ReactNativeHost;)Lcom/facebook/react/ReactHost;
-	public static final fun getDefaultReactHost (Landroid/content/Context;Ljava/util/List;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;ZZLjava/util/List;)Lcom/facebook/react/ReactHost;
-	public static synthetic fun getDefaultReactHost$default (Landroid/content/Context;Ljava/util/List;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;ZZLjava/util/List;ILjava/lang/Object;)Lcom/facebook/react/ReactHost;
+	public static final fun getDefaultReactHost (Landroid/content/Context;Ljava/util/List;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;ZZLjava/util/List;Lcom/facebook/react/bridge/JSBundleLoader;)Lcom/facebook/react/ReactHost;
+	public static synthetic fun getDefaultReactHost$default (Landroid/content/Context;Ljava/util/List;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;ZZLjava/util/List;Lcom/facebook/react/bridge/JSBundleLoader;ILjava/lang/Object;)Lcom/facebook/react/ReactHost;
 }
 
 public abstract class com/facebook/react/defaults/DefaultReactNativeHost : com/facebook/react/ReactNativeHost {

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

@@ -45,6 +45,7 @@ public object DefaultReactHost {
    * @param useDevSupport whether to enable dev support, default to ReactBuildConfig.DEBUG.
    * @param cxxReactPackageProviders a list of cxxreactpackage providers (to register c++ turbo
    *   modules)
+   * @param jsBundleLoader a [JSBundleLoader] to use for creating the [ReactHost]
    *
    * TODO(T186951312): Should this be @UnstableReactNativeAPI?
    */
@@ -59,25 +60,28 @@ public object DefaultReactHost {
       isHermesEnabled: Boolean = true,
       useDevSupport: Boolean = ReactBuildConfig.DEBUG,
       cxxReactPackageProviders: List<(ReactContext) -> CxxReactPackage> = emptyList(),
+      jsBundleLoader: JSBundleLoader? = null,
   ): ReactHost {
     if (reactHost == null) {
-      val jsBundleLoader =
-          if (jsBundleFilePath != null) {
-            if (jsBundleFilePath.startsWith("assets://")) {
-              JSBundleLoader.createAssetLoader(context, jsBundleFilePath, true)
-            } else {
-              JSBundleLoader.createFileLoader(jsBundleFilePath)
-            }
-          } else {
-            JSBundleLoader.createAssetLoader(context, "assets://$jsBundleAssetPath", true)
-          }
+
+      val bundleLoader =
+          jsBundleLoader
+              ?: if (jsBundleFilePath != null) {
+                if (jsBundleFilePath.startsWith("assets://")) {
+                  JSBundleLoader.createAssetLoader(context, jsBundleFilePath, true)
+                } else {
+                  JSBundleLoader.createFileLoader(jsBundleFilePath)
+                }
+              } else {
+                JSBundleLoader.createAssetLoader(context, "assets://$jsBundleAssetPath", true)
+              }
       val jsRuntimeFactory = if (isHermesEnabled) HermesInstance() else JSCInstance()
       val defaultTmmDelegateBuilder = DefaultTurboModuleManagerDelegate.Builder()
       cxxReactPackageProviders.forEach { defaultTmmDelegateBuilder.addCxxReactPackage(it) }
       val defaultReactHostDelegate =
           DefaultReactHostDelegate(
               jsMainModulePath = jsMainModulePath,
-              jsBundleLoader = jsBundleLoader,
+              jsBundleLoader = bundleLoader,
               reactPackages = packageList,
               jsRuntimeFactory = jsRuntimeFactory,
               turboModuleManagerDelegateBuilder = defaultTmmDelegateBuilder)