Apply Animated initialProps handling to Fabric only (#34927)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/34927

The changes made in D36902220 (https://github.com/facebook/react-native/commit/a04195167bbd8f27c6141c0239a61a345cac5a88) and D36958882 (https://github.com/facebook/react-native/commit/d8c25ca1b62df2b93f70bbb1f7b379643ab9ccd4) attempted to reduce flickering and consistency issues when using Animated.

In the old renderer, we explicitly reset all animated props, and wait for the subsequent React commit to set the props to the right state, but if `initialProps` are used, the React reconciliation may not be able to identify the prop-update is required and will leave out the value. This behaviour is different in the new renderer, where we do not explicitly `restoreDefaultValues` on detaching the animated node, and instead rely on the latest state being correct(?).

Changelog:
[General][Fixed] Stop styles from being reset when detaching Animated.Values in old renderer

Fixes #34665

Reviewed By: rshest

Differential Revision: D40194072

fbshipit-source-id: 1b3fb1d1f4a39036a501a8a21e57002035dd5659

# Conflicts:
#	Libraries/Animated/createAnimatedComponent.js

Libraries/Animated/createAnimatedComponent.js

@@ -200,18 +200,25 @@ function createAnimatedComponent<Props: {+[string]: mixed, ...}, Instance>(
       },
     });
 
-    render() {
+    render(): React.Node {
+      // When rendering in Fabric and an AnimatedValue is used, we keep track of
+      // the initial value of that Value, to avoid additional prop updates when
+      // this component re-renders
+      const initialPropsIfFabric = this._isFabric()
+        ? this._initialAnimatedProps
+        : null;
+
       const animatedProps =
-        this._propsAnimated.__getValue(this._initialAnimatedProps) || {};
+        this._propsAnimated.__getValue(initialPropsIfFabric) || {};
+      if (!this._initialAnimatedProps) {
+        this._initialAnimatedProps = animatedProps;
+      }
+
       const {style = {}, ...props} = animatedProps;
       const {style: passthruStyle = {}, ...passthruProps} =
         this.props.passthroughAnimatedPropExplicitValues || {};
       const mergedStyle = {...style, ...passthruStyle};
 
-      if (!this._initialAnimatedProps) {
-        this._initialAnimatedProps = animatedProps;
-      }
-
       // Force `collapsable` to be false so that native view is not flattened.
       // Flattened views cannot be accurately referenced by a native driver.
       return (

Libraries/Animated/nodes/AnimatedProps.js

@@ -46,9 +46,7 @@ class AnimatedProps extends AnimatedNode {
         // as they may not be up to date, so we use the initial value to ensure that values of
         // native animated nodes do not impact rerenders.
         if (value instanceof AnimatedStyle) {
-          props[key] = value.__getValue(
-            initialProps ? initialProps.style : null,
-          );
+          props[key] = value.__getValue(initialProps?.style);
         } else if (!initialProps || !value.__isNative) {
           props[key] = value.__getValue();
         } else if (initialProps.hasOwnProperty(key)) {

ReactAndroid/src/main/java/com/facebook/react/animated/NativeAnimatedModule.java

@@ -871,7 +871,7 @@ public class NativeAnimatedModule extends NativeAnimatedModuleSpec
     if (ANIMATED_MODULE_DEBUG) {
       FLog.d(
           NAME,
-          "queue: disconnectAnimatedNodeFromView: " + animatedNodeTag + " viewTag: " + viewTag);
+          "queue disconnectAnimatedNodeFromView: " + animatedNodeTag + " viewTag: " + viewTag);
     }
 
     decrementInFlightAnimationsForViewTag(viewTag);
@@ -883,7 +883,7 @@ public class NativeAnimatedModule extends NativeAnimatedModuleSpec
             if (ANIMATED_MODULE_DEBUG) {
               FLog.d(
                   NAME,
-                  "execute: disconnectAnimatedNodeFromView: "
+                  "execute disconnectAnimatedNodeFromView: "
                       + animatedNodeTag
                       + " viewTag: "
                       + viewTag);
@@ -897,8 +897,7 @@ public class NativeAnimatedModule extends NativeAnimatedModuleSpec
   public void restoreDefaultValues(final double animatedNodeTagDouble) {
     final int animatedNodeTag = (int) animatedNodeTagDouble;
     if (ANIMATED_MODULE_DEBUG) {
-      FLog.d(
-          NAME, "queue restoreDefaultValues: disconnectAnimatedNodeFromView: " + animatedNodeTag);
+      FLog.d(NAME, "queue restoreDefaultValues: " + animatedNodeTag);
     }
 
     addPreOperation(
@@ -906,10 +905,7 @@ public class NativeAnimatedModule extends NativeAnimatedModuleSpec
           @Override
           public void execute(NativeAnimatedNodesManager animatedNodesManager) {
             if (ANIMATED_MODULE_DEBUG) {
-              FLog.d(
-                  NAME,
-                  "execute restoreDefaultValues: disconnectAnimatedNodeFromView: "
-                      + animatedNodeTag);
+              FLog.d(NAME, "execute restoreDefaultValues: " + animatedNodeTag);
             }
             animatedNodesManager.restoreDefaultValues(animatedNodeTag);
           }