Fix nightly builds by exposing react_renderer_animationbackend via prefab (facebook#55261)

Summary:
Pull Request resolved: facebook#55261

The nightlies of a couple of libraries started to fail because some headers
are now importing `AnimationChoreographer.h` from `react_renderer_animationbackend`
which is not exposed via prefab.

See https://github.com/react-native-community/nightly-tests/actions/runs/21197740502

This fixes it.

Changelog:
[Internal] [Changed] -

Reviewed By: cipolleschi

Differential Revision: D91118249

fbshipit-source-id: 3dae6a842e2c86bd5b6e15bd6f8dd497c6892f8a

Author: cortinico

packages/react-native/ReactAndroid/build.gradle.kts

@@ -270,6 +270,11 @@ val preparePrefab by
                       Pair("src/main/jni/first-party/yogajni/jni", ""),
                       // oscompat
                       Pair("../ReactCommon/oscompat/", "oscompat/"),
+                      // react_renderer_animationbackend
+                      Pair(
+                          "../ReactCommon/react/renderer/animationbackend/",
+                          "react/renderer/animationbackend/",
+                      ),
                   ),
               ),
               PrefabPreprocessingEntry(