Make ModalHostViewUtils header private (#58883)

Summary:
Pull Request resolved: #58883

`react/renderer/components/modal/ModalHostViewUtils.h` declares `ModalHostViewScreenSize()`, a per-platform helper that is only used to compute the default screen size of `ModalHostViewState`. Lower it from "for frameworks" to private.

It was reachable from the "for frameworks" API only because `ModalHostViewState.h` called it from an inline default constructor. Move that constructor out of line into `ModalHostViewState.cpp`, so `ModalHostViewState.h` no longer includes the utils header.

While here, `ModalHostViewState.h` now gets `Float`/`Size` from the `<React/Graphics.h>` umbrella instead of including the public `react/renderer/graphics/Float.h` directly (`Size` previously only arrived transitively through the utils header).

Changelog: [Internal]

___

Differential Revision: D123601668

fbshipit-source-id: c847a73a532f1cb88b9b3b0757be639e2bb25288

Author: coado

packages/react-native/ReactCommon/react/renderer/components/modal/ModalHostViewState.cpp

@@ -6,9 +6,13 @@
  */
 
 #include "ModalHostViewState.h"
+#include "ModalHostViewUtils.h"
 
 namespace facebook::react {
 
+ModalHostViewState::ModalHostViewState()
+    : screenSize(ModalHostViewScreenSize()) {}
+
 #ifdef RN_SERIALIZABLE_STATE
 folly::dynamic ModalHostViewState::getDynamic() const {
   return folly::dynamic::object("screenWidth", screenSize.width)(

packages/react-native/ReactCommon/react/renderer/components/modal/ModalHostViewState.h

@@ -9,9 +9,8 @@
 
 #include <react/cxxstableapi/FrameworksGuard.h>
 
+#include <React/Graphics.h>
 #include <React/RendererCore.h>
-#include <react/renderer/graphics/Float.h>
-#include "ModalHostViewUtils.h"
 
 #ifdef RN_SERIALIZABLE_STATE
 #include <folly/dynamic.h>
@@ -26,7 +25,7 @@ class ModalHostViewState final {
  public:
   using Shared = std::shared_ptr<const ModalHostViewState>;
 
-  ModalHostViewState() : screenSize(ModalHostViewScreenSize()) {}
+  ModalHostViewState();
   ModalHostViewState(Size screenSize_) : screenSize(screenSize_) {};
 
 #ifdef RN_SERIALIZABLE_STATE

packages/react-native/ReactCommon/react/renderer/components/modal/ModalHostViewUtils.h

@@ -7,7 +7,7 @@
 
 #pragma once
 
-#include <react/cxxstableapi/FrameworksGuard.h>
+#include <react/cxxstableapi/PrivateGuard.h>
 
 #include <react/renderer/graphics/Size.h>