Fabric: Support for setIsJSResponder, all the native changes

Summary:
This is a Fabric-compliant implementation of `JSResponder` feature. To make it work e2e we also need to update FabricRenderer in React repository. But before we can do this, we need to ship the native changes.

Changelog: [Internal] Fabric-specific internal change.

Reviewed By: mdvacca

Differential Revision: D24630027

fbshipit-source-id: 70c30e1250b554d83862956b536714704093072f

ReactAndroid/src/main/java/com/facebook/react/fabric/jni/Binding.cpp

@@ -1106,11 +1106,9 @@ void Binding::schedulerDidSendAccessibilityEvent(
       eventTypeStr.get());
 }
 
-void Binding::schedulerDidSetJSResponder(
-    SurfaceId surfaceId,
-    const ShadowView &shadowView,
-    const ShadowView &initialShadowView,
-    bool blockNativeResponder) {
+void Binding::schedulerDidSetIsJSResponder(
+    ShadowView const &shadowView,
+    bool isJSResponder) {
   jni::global_ref<jobject> localJavaUIManager = getJavaUIManager();
   if (!localJavaUIManager) {
     LOG(ERROR) << "Binding::schedulerSetJSResponder: JavaUIManager disappeared";
@@ -1121,27 +1119,24 @@ void Binding::schedulerDidSetJSResponder(
       jni::findClassStatic(Binding::UIManagerJavaDescriptor)
           ->getMethod<void(jint, jint, jint, jboolean)>("setJSResponder");
 
-  setJSResponder(
-      localJavaUIManager,
-      shadowView.surfaceId,
-      shadowView.tag,
-      initialShadowView.tag,
-      (jboolean)blockNativeResponder);
-}
-
-void Binding::schedulerDidClearJSResponder() {
-  jni::global_ref<jobject> localJavaUIManager = getJavaUIManager();
-  if (!localJavaUIManager) {
-    LOG(ERROR)
-        << "Binding::schedulerClearJSResponder: JavaUIManager disappeared";
-    return;
-  }
-
   static auto clearJSResponder =
       jni::findClassStatic(Binding::UIManagerJavaDescriptor)
           ->getMethod<void()>("clearJSResponder");
 
-  clearJSResponder(localJavaUIManager);
+  if (isJSResponder) {
+    setJSResponder(
+        localJavaUIManager,
+        shadowView.surfaceId,
+        shadowView.tag,
+        // The closest non-flattened ancestor of the same value if the node is
+        // not flattened. For now, we don't support the case when the node can
+        // be flattened because the only component that uses this feature -
+        // ScrollView - cannot be flattened.
+        shadowView.tag,
+        (jboolean) true);
+  } else {
+    clearJSResponder(localJavaUIManager);
+  }
 }
 
 void Binding::registerNatives() {

ReactAndroid/src/main/java/com/facebook/react/fabric/jni/Binding.h

@@ -140,13 +140,9 @@ class Binding : public jni::HybridClass<Binding>,
       const ShadowView &shadowView,
       std::string const &eventType) override;
 
-  void schedulerDidSetJSResponder(
-      SurfaceId surfaceId,
-      const ShadowView &shadowView,
-      const ShadowView &initialShadowView,
-      bool blockNativeResponder) override;
-
-  void schedulerDidClearJSResponder() override;
+  void schedulerDidSetIsJSResponder(
+      ShadowView const &shadowView,
+      bool isJSResponder) override;
 
   void setPixelDensity(float pointScaleFactor);