Cover jsinspector-modern/network:jsinspector_network with Stable API guards

Summary:
Marks `jsinspector-modern/network` as a private module under the C++ Stable API by adding `#include <react/cxxstableapi/PrivateGuard.h>` to its four exported headers (`BoundedRequestBuffer.h`, `CdpNetwork.h`, `HttpUtils.h`, `NetworkHandler.h`), and wiring the `React-cxxstableapi` dependency into BUCK and the podspec.

The guards are inert unless a consumer defines `RN_STRICT_API`, so there is no behavior change.

Changelog: [Internal]

Differential Revision: D116026740

Author: j-piasecki

packages/react-native/ReactCommon/jsinspector-modern/network/BoundedRequestBuffer.h

@@ -7,6 +7,8 @@
 
 #pragma once
 
+#include <react/cxxstableapi/PrivateGuard.h>
+
 #include <deque>
 #include <memory>
 #include <string>

packages/react-native/ReactCommon/jsinspector-modern/network/CdpNetwork.h

@@ -7,6 +7,8 @@
 
 #pragma once
 
+#include <react/cxxstableapi/PrivateGuard.h>
+
 #include <folly/dynamic.h>
 
 #include <string>

packages/react-native/ReactCommon/jsinspector-modern/network/HttpUtils.h

@@ -7,6 +7,8 @@
 
 #pragma once
 
+#include <react/cxxstableapi/PrivateGuard.h>
+
 #include <map>
 #include <string>
 

packages/react-native/ReactCommon/jsinspector-modern/network/NetworkHandler.h

@@ -7,6 +7,8 @@
 
 #pragma once
 
+#include <react/cxxstableapi/PrivateGuard.h>
+
 #include "BoundedRequestBuffer.h"
 #include "CdpNetwork.h"
 

packages/react-native/ReactCommon/jsinspector-modern/network/React-jsinspectornetwork.podspec

@@ -48,5 +48,7 @@ Pod::Spec.new do |s|
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
 
+  s.dependency "React-cxxstableapi"
+
   mark_as_react_native_build(s)
 end