Assert `DefaultComponentsRegistry::registerComponentDescriptorsFromEn…

…tryPoint` is set (#42312)

Summary:
Assert `DefaultComponentsRegistry::registerComponentDescriptorsFromEntryPoint` is set. For full context, see #42244.

## Changelog:

[ANDROID] [FIXED] - Assert `DefaultComponentsRegistry::registerComponentDescriptorsFromEntryPoint` is set

Pull Request resolved: #42312

Test Plan: n/a

Reviewed By: javache

Differential Revision: D52835542

Pulled By: cortinico

fbshipit-source-id: be323953fc47a3a3b746c7abdd614f96d232af34

packages/react-native/ReactAndroid/src/main/jni/react/newarchdefaults/DefaultComponentsRegistry.cpp

@@ -9,6 +9,7 @@
 
 #include <CoreComponentsRegistry.h>
 #include <fbjni/fbjni.h>
+#include <react/debug/react_native_assert.h>
 #include <react/renderer/componentregistry/ComponentDescriptorProviderRegistry.h>
 #include <react/renderer/components/rncore/ComponentDescriptors.h>
 
@@ -24,6 +25,10 @@ std::shared_ptr<const ComponentDescriptorProviderRegistry>
 DefaultComponentsRegistry::sharedProviderRegistry() {
   auto providerRegistry = CoreComponentsRegistry::sharedProviderRegistry();
 
+  react_native_assert(
+      DefaultComponentsRegistry::registerComponentDescriptorsFromEntryPoint &&
+      "'registerComponentDescriptorsFromEntryPoint' was not initialized in 'JNI_OnLoad'");
+
   (DefaultComponentsRegistry::registerComponentDescriptorsFromEntryPoint)(
       providerRegistry);