Summary:
This creates a new dynamic library that we want to be the only .so that is loaded from apps/libraries.

Changelog:
[Internal] [Changed] - Create the libreactnative.so dependency

Differential Revision: D55751682

Summary:
As we're moving towards a single `libreactnative.so` file, we need to remove several of our prefab targets. Here I'm cleaning up those that are not having an OnLoad.cpp file which needs to be loaded from SoLoader.

This is breaking for libraries using native dependencies via Prefab (i.e. search for `ReactAndroid::` in CMakeLists.txt files for your project).

If so, the CMakeLists.txt files should be updated as follows:

```diff
- ReactAndroid::react_render_debug
+ ReactAndroid::reactnative
```

This applies to every prefab dependencies (the example is just for `react_render_debug`

Changelog:
[General] [Breaking] - Remove several libs from default App CMake setup

Differential Revision: D55751683

…ative.so

Summary:
Other two libraries that don't need to be dynamic libraries but can just be exposed via libreactnative.so

Changelog:
[Internal] [Changed] -  Move react_featureflags and react_render_consistency inside libreactnative.so

Differential Revision: D55796945

Summary:
There is a circular dependency between libreactnative.so and libreact_codegen_rncore.so which I'm breaking here.

Changelog:
[Internal] [Changed] - Move react_codegen_* + react_nativemodules_* libraries to static linking

Differential Revision: D55799200

Summary:
This is a more complex library as I had to introduce a `ReactNativeSoLoader` to handle the internal/oss scenarios.

Changelog:
[Internal] [Changed] - Move libreact_newarchdefaults.so inside libreactnative.so

Differential Revision: D55796933

Summary:
Pull Request resolved: facebook#45641

Moving another library inside libreactnative.so

Changelog:
[Internal] [Changed] - Move libmapbufferjni.so inside libreactnative.so

Reviewed By: javache

Differential Revision: D55799199