Always set RN$stopSurface (#26808)

Summary:
## Summary
To support incremental adoption of bridgeless logic we want to default
to using these globals whenever they're available.

## How did you test this change?
#37410

DiffTrain build for commit react/react@a389046.

Reviewed By: hoxyq

Differential Revision: D45816985

Pulled By: javache

fbshipit-source-id: 592e0f1eb726261335f703502c74a2548f7da2bc

Author: javache

packages/react-native/Libraries/Renderer/REVISION

@@ -1 +1 @@
-67a05d03e38b9837e27c9fe0a673557e63ff03c5
+a389046a529c6d22ba5895dd7f5d4b0b8d17c345

packages/react-native/Libraries/Renderer/shims/ReactFabric.js

@@ -7,7 +7,7 @@
  * @noformat
  * @flow
  * @nolint
- * @generated SignedSource<<cece19ddbec9f287c995721f49c68977>>
+ * @generated SignedSource<<c1cc197c110e3a49a5e8f6bd5d32b23f>>
  */
 
 'use strict';
@@ -24,9 +24,9 @@ if (__DEV__) {
   ReactFabric = require('../implementations/ReactFabric-prod');
 }
 
-if (global.RN$Bridgeless) {
-  global.RN$stopSurface = ReactFabric.stopSurface;
-} else {
+global.RN$stopSurface = ReactFabric.stopSurface;
+
+if (global.RN$Bridgeless !== true) {
   BatchedBridge.registerCallableModule('ReactFabric', ReactFabric);
 }