hook up unstable_enableSyncVoidMethods to ReactFeatureFlags (#39988)

Summary:
Pull Request resolved: #39988

Changelog: [Internal]

in this pr, we integrate the sync void configuration with our feature flag infra

Reviewed By: luluwu2032

Differential Revision: D50030743

fbshipit-source-id: 03505e5e1f74aa90dc16f33fa4e93f9de9660dae

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/ReactPackageTurboModuleManagerDelegate.java

@@ -42,6 +42,9 @@ interface ModuleProvider {
       mShouldEnableLegacyModuleInterop
           && ReactFeatureFlags.unstable_useTurboModuleInteropForAllTurboModules;
 
+  private final boolean mEnableTurboModuleSyncVoidMethods =
+      ReactFeatureFlags.unstable_enableTurboModuleSyncVoidMethods;
+
   protected ReactPackageTurboModuleManagerDelegate() {
     super();
   }
@@ -140,6 +143,10 @@ public boolean unstable_shouldRouteTurboModulesThroughLegacyModuleInterop() {
     return mShouldRouteTurboModulesThroughLegacyModuleInterop;
   }
 
+  public boolean unstable_enableSyncVoidMethods() {
+    return mEnableTurboModuleSyncVoidMethods;
+  }
+
   @Nullable
   @Override
   public TurboModule getModule(String moduleName) {

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/config/ReactFeatureFlags.java

@@ -36,6 +36,8 @@ public class ReactFeatureFlags {
    */
   public static volatile boolean unstable_useTurboModuleInteropForAllTurboModules = false;
 
+  public static volatile boolean unstable_enableTurboModuleSyncVoidMethods = false;
+
   /**
    * Should this application use the new (Fabric) Renderer? If yes, all rendering in this app will
    * use Fabric instead of the legacy renderer.