Fix non-compiling Java snippet in Android Fabric guide

The ReactWebView.java snippet fails to compile as written: LayoutParams
resolves to AbsoluteLayout.LayoutParams which has no (int, int)
constructor, there is no context variable in scope, and EventDispatcher
is never imported.

Also enable JavaScript, which the Android WebView disables by default
while the WKWebView used on iOS enables it, so that the component
behaves the same on both platforms.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: dazakdev

docs/fabric-native-components-android.md

@@ -38,6 +38,7 @@ package com.webview;
 
 import android.content.Context;
 import android.util.AttributeSet;
+import android.view.ViewGroup;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;
 
@@ -46,6 +47,7 @@ import com.facebook.react.bridge.WritableMap;
 import com.facebook.react.bridge.ReactContext;
 import com.facebook.react.uimanager.UIManagerHelper;
 import com.facebook.react.uimanager.events.Event;
+import com.facebook.react.uimanager.events.EventDispatcher;
 
 public class ReactWebView extends WebView {
   public ReactWebView(Context context) {
@@ -64,7 +66,8 @@ public class ReactWebView extends WebView {
   }
 
   private void configureComponent() {
-    this.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
+    this.getSettings().setJavaScriptEnabled(true);
+    this.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
     this.setWebViewClient(new WebViewClient() {
       @Override
       public void onPageFinished(WebView view, String url) {
@@ -74,7 +77,7 @@ public class ReactWebView extends WebView {
   }
 
   public void emitOnScriptLoaded(OnScriptLoadedEventResult result) {
-    ReactContext reactContext = (ReactContext) context;
+    ReactContext reactContext = (ReactContext) getContext();
     int surfaceId = UIManagerHelper.getSurfaceId(reactContext);
     EventDispatcher eventDispatcher = UIManagerHelper.getEventDispatcherForReactTag(reactContext, getId());
     WritableMap payload = Arguments.createMap();
@@ -142,6 +145,7 @@ class ReactWebView: WebView {
   }
 
   private fun configureComponent() {
+    this.settings.javaScriptEnabled = true
     this.layoutParams = LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)
     this.webViewClient = object : WebViewClient() {
       override fun onPageFinished(view: WebView, url: String) {
@@ -187,6 +191,8 @@ The `ReactWebView` extends the Android `WebView` so you can reuse all the proper
 
 The class defines the three Android constructors but defers their actual implementation to the private `configureComponent` function. This function takes care of initializing all the components specific properties: in this case you are setting the layout of the `WebView` and you are defining the `WebClient` that you use to customize the behavior of the `WebView`. In this code, the `ReactWebView` emits an event when the page finishes loading, by implementing the `WebClient`'s `onPageFinished` method.
 
+`configureComponent` also enables JavaScript. The Android `WebView` [disables it by default](<https://developer.android.com/reference/android/webkit/WebSettings#setJavaScriptEnabled(boolean)>), while the `WKWebView` used on iOS enables it. Without this line, the same component would run web content differently on the two platforms. Only enable JavaScript for content you trust.
+
 The code then defines a helper function to actually emit an event. To emit an event, you have to:
 
 - grab a reference to the `ReactContext`;