Migrate feature flag for automatic Fabric interop to new feature flag system

Summary: Changelog: [internal]

Differential Revision: D65062305

Author: rubennorte

packages/react-native/Libraries/AppDelegate/RCTAppDelegate.mm

@@ -316,6 +316,10 @@ bool enableFabricRenderer() override
   {
     return true;
   }
+  bool useFabricInterop() override
+  {
+    return true;
+  }
   bool useTurboModules() override
   {
     return true;

packages/react-native/ReactCommon/react/config/ReactNativeConfig.cpp

@@ -10,9 +10,6 @@
 namespace facebook::react {
 
 bool EmptyReactNativeConfig::getBool(const std::string& param) const {
-  if (param == "react_fabric:enabled_automatic_interop_android") {
-    return true;
-  }
   return false;
 }
 

packages/react-native/ReactCommon/react/renderer/componentregistry/CMakeLists.txt

@@ -23,8 +23,8 @@ target_link_libraries(react_render_componentregistry
         folly_runtime
         glog_init
         jsi
-        react_config
         react_debug
+        react_featureflags
         react_render_core
         react_render_debug
         react_utils

packages/react-native/ReactCommon/react/renderer/componentregistry/ComponentDescriptorRegistry.cpp

@@ -9,8 +9,8 @@
 
 #include "componentNameByReactViewName.h"
 
-#include <react/config/ReactNativeConfig.h>
 #include <react/debug/react_native_assert.h>
+#include <react/featureflags/ReactNativeFeatureFlags.h>
 #include <react/renderer/componentregistry/ComponentDescriptorProviderRegistry.h>
 #include <react/renderer/components/legacyviewmanagerinterop/UnstableLegacyViewManagerAutomaticComponentDescriptor.h>
 #include <react/renderer/components/legacyviewmanagerinterop/UnstableLegacyViewManagerAutomaticShadowNode.h>
@@ -84,11 +84,7 @@ const ComponentDescriptor& ComponentDescriptorRegistry::at(
   }
 
   if (it == _registryByName.end()) {
-    auto reactNativeConfig_ =
-        contextContainer_->at<std::shared_ptr<const ReactNativeConfig>>(
-            "ReactNativeConfig");
-    if (reactNativeConfig_->getBool(
-            "react_fabric:enabled_automatic_interop_android")) {
+    if (ReactNativeFeatureFlags::useFabricInterop()) {
       auto componentDescriptor = std::make_shared<
           const UnstableLegacyViewManagerAutomaticComponentDescriptor>(
           parameters_, unifiedComponentName);