Refactor initialization of Fabric to avoid loading UIManagerModule

Summary:
This diff refactors the intialization of Fabric in order to avoid loading UIManagerModule as part of the creation of FabricJSIModuleProvider.

One caveat is that now we are not taking into consideration the flag mLazyViewManagersEnabled
```
master/xplat/js/react-native-github/ReactAndroid/src/main/java/com/facebook/react/CoreModulesPackage.java177

if (mLazyViewManagersEnabled) {
```
As a side effect of this diff view managers will be initialized twice if the user has fabric and paper enabled

This diff was originally backed out in D25739854 (4984c1e) because it produced a couple of bugs:
- https://fb.workplace.com/groups/rn.support/permalink/4917641074951135/
- https://fb.workplace.com/groups/rn.support/permalink/4918163014898941/

These bugs are fixed by D25667987 (2e63147).

changelog: [internal] internal

Reviewed By: JoshuaGross

Differential Revision: D25746024

fbshipit-source-id: 3d12d29973a12b1edfea75f4dd954790f835e9bd

ReactAndroid/src/main/java/com/facebook/react/fabric/FabricJSIModuleProvider.java

@@ -8,7 +8,6 @@
 package com.facebook.react.fabric;
 
 import androidx.annotation.NonNull;
-import com.facebook.infer.annotation.Assertions;
 import com.facebook.react.bridge.JSIModuleProvider;
 import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.bridge.UIManager;
@@ -26,24 +25,28 @@
 import com.facebook.react.fabric.mounting.mountitems.PreAllocateViewMountItem;
 import com.facebook.react.fabric.mounting.mountitems.SendAccessibilityEvent;
 import com.facebook.react.uimanager.StateWrapper;
-import com.facebook.react.uimanager.UIManagerModule;
+import com.facebook.react.uimanager.ViewManagerRegistry;
 import com.facebook.react.uimanager.events.BatchEventDispatchedListener;
 import com.facebook.react.uimanager.events.EventDispatcher;
+import com.facebook.react.uimanager.events.EventDispatcherImpl;
 import com.facebook.systrace.Systrace;
 
 public class FabricJSIModuleProvider implements JSIModuleProvider<UIManager> {
 
   @NonNull private final ReactApplicationContext mReactApplicationContext;
   @NonNull private final ComponentFactory mComponentFactory;
   @NonNull private final ReactNativeConfig mConfig;
+  @NonNull private final ViewManagerRegistry mViewManagerRegistry;
 
   public FabricJSIModuleProvider(
       @NonNull ReactApplicationContext reactApplicationContext,
       @NonNull ComponentFactory componentFactory,
-      @NonNull ReactNativeConfig config) {
+      @NonNull ReactNativeConfig config,
+      @NonNull ViewManagerRegistry viewManagerRegistry) {
     mReactApplicationContext = reactApplicationContext;
     mComponentFactory = componentFactory;
     mConfig = config;
+    mViewManagerRegistry = viewManagerRegistry;
   }
 
   @Override
@@ -79,15 +82,10 @@ public UIManager get() {
   private FabricUIManager createUIManager(@NonNull EventBeatManager eventBeatManager) {
     Systrace.beginSection(
         Systrace.TRACE_TAG_REACT_JAVA_BRIDGE, "FabricJSIModuleProvider.createUIManager");
-    UIManagerModule nativeModule =
-        Assertions.assertNotNull(mReactApplicationContext.getNativeModule(UIManagerModule.class));
-    EventDispatcher eventDispatcher = nativeModule.getEventDispatcher();
+    EventDispatcher eventDispatcher = new EventDispatcherImpl(mReactApplicationContext);
     FabricUIManager fabricUIManager =
         new FabricUIManager(
-            mReactApplicationContext,
-            nativeModule.getViewManagerRegistry_DO_NOT_USE(),
-            eventDispatcher,
-            eventBeatManager);
+            mReactApplicationContext, mViewManagerRegistry, eventDispatcher, eventBeatManager);
 
     Systrace.endSection(Systrace.TRACE_TAG_REACT_JAVA_BRIDGE);
     return fabricUIManager;

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

@@ -34,6 +34,7 @@
 import com.facebook.react.module.model.ReactModuleInfoProvider;
 import com.facebook.react.shell.MainReactPackage;
 import com.facebook.react.turbomodule.core.TurboModuleManager;
+import com.facebook.react.uimanager.ViewManagerRegistry;
 import com.facebook.react.views.text.ReactFontManager;
 import com.facebook.soloader.SoLoader;
 import java.lang.reflect.InvocationTargetException;
@@ -168,6 +169,13 @@ public JSIModuleType getJSIModuleType() {
                       public JSIModuleProvider<UIManager> getJSIModuleProvider() {
                         final ComponentFactory ComponentFactory = new ComponentFactory();
                         CoreComponentsRegistry.register(ComponentFactory);
+                        final ReactInstanceManager reactInstanceManager = getReactInstanceManager();
+
+                        ViewManagerRegistry viewManagerRegistry =
+                            new ViewManagerRegistry(
+                                reactInstanceManager.getOrCreateViewManagers(
+                                    reactApplicationContext));
+
                         return new FabricJSIModuleProvider(
                             reactApplicationContext,
                             ComponentFactory,
@@ -192,7 +200,8 @@ public String getString(final String s) {
                               public double getDouble(final String s) {
                                 return 0;
                               }
-                            });
+                            },
+                            viewManagerRegistry);
                       }
                     });
               }