Expose private node management methods in UIManager (facebook#33688)

Summary:
Pull Request resolved: facebook#33688

These methods used to be public in the legacy implementation, and hiding them significantly reduces amount of customization available to other clients outside Fabric core.

Changelog: [Internal] Allow external callers to call UIManager methods

Reviewed By: cipolleschi

Differential Revision: D35818114

fbshipit-source-id: 4dc4177c82b5db9ae3d136a1a83f5ec3123b971f

ReactCommon/react/renderer/uimanager/UIManager.h

@@ -111,14 +111,6 @@ class UIManager final : public ShadowTreeDelegate {
       RootShadowNode::Shared const &oldRootShadowNode,
       RootShadowNode::Unshared const &newRootShadowNode) const override;
 
- private:
-  friend class UIManagerBinding;
-  friend class Scheduler;
-  friend class SurfaceHandler;
-
-  // `TimelineController` needs to call private `getShadowTreeRegistry()`.
-  friend class TimelineController;
-
   ShadowNode::Shared createNode(
       Tag tag,
       std::string const &componentName,
@@ -174,6 +166,13 @@ class UIManager final : public ShadowTreeDelegate {
       const ShadowNode::Shared &shadowNode,
       std::string const &eventType);
 
+  ShadowTreeRegistry const &getShadowTreeRegistry() const;
+
+ private:
+  friend class UIManagerBinding;
+  friend class Scheduler;
+  friend class SurfaceHandler;
+
   /**
    * Configure a LayoutAnimation to happen on the next commit.
    * This API configures a global LayoutAnimation starting from the root node.
@@ -184,8 +183,6 @@ class UIManager final : public ShadowTreeDelegate {
       jsi::Value const &successCallback,
       jsi::Value const &failureCallback) const;
 
-  ShadowTreeRegistry const &getShadowTreeRegistry() const;
-
   SharedComponentDescriptorRegistry componentDescriptorRegistry_;
   UIManagerDelegate *delegate_;
   UIManagerAnimationDelegate *animationDelegate_{nullptr};