Add a React Feature Flag to control TextInlineView fix

Summary:
This diff adds a temporary Feature Flag to control a fix in TextInlineView (see previous diffs of the stack)

changelog: [internal]

Reviewed By: JoshuaGross

Differential Revision: D20812920

fbshipit-source-id: 90fece9b29ba173546d96e4d9baf1ccabb3031b2

ReactAndroid/src/main/java/com/facebook/react/config/ReactFeatureFlags.java

@@ -67,4 +67,10 @@ public class ReactFeatureFlags {
    * <p>The react flag is disabled by default because this is increasing ANRs (T57363204)
    */
   public static boolean clipChildRectsIfOverflowIsHidden = false;
+
+  /**
+   * Temporary feature flat to control a fix in the transition to layoutOnlyViews TODO T61185028:
+   * remove this when bug is fixed
+   */
+  public static boolean enableTransitionLayoutOnlyViewCleanup = false;
 }

ReactAndroid/src/main/java/com/facebook/react/uimanager/NativeViewHierarchyOptimizer.java

@@ -9,9 +9,11 @@ package com.facebook.react.uimanager;
 
 import android.util.SparseBooleanArray;
 import androidx.annotation.Nullable;
+import com.facebook.common.logging.FLog;
 import com.facebook.infer.annotation.Assertions;
 import com.facebook.react.bridge.ReadableArray;
 import com.facebook.react.bridge.ReadableMapKeySetIterator;
+import com.facebook.react.config.ReactFeatureFlags;
 
 /**
  * Class responsible for optimizing the native view hierarchy while still respecting the final UI
@@ -46,6 +48,8 @@ import com.facebook.react.bridge.ReadableMapKeySetIterator;
  */
 public class NativeViewHierarchyOptimizer {
 
+  private static final String TAG = "NativeViewHierarchyOptimizer";
+
   private static class NodeIndexPair {
     public final ReactShadowNode node;
     public final int index;
@@ -421,6 +425,18 @@ public class NativeViewHierarchyOptimizer {
     // Bit of a hack: we need to update the layout of this node's children now that it's no longer
     // layout-only, but we may still receive more layout updates at the end of this batch that we
     // don't want to ignore.
+    if (ReactFeatureFlags.enableTransitionLayoutOnlyViewCleanup) {
+      FLog.i(
+          TAG,
+          "Transitioning LayoutOnlyView - tag: "
+              + node.getReactTag()
+              + " - rootTag: "
+              + node.getRootTag()
+              + " - hasProps: "
+              + (props != null)
+              + " - tagsWithLayout.size: "
+              + mTagsWithLayoutVisited.size());
+    }
     Assertions.assertCondition(mTagsWithLayoutVisited.size() == 0);
     applyLayoutBase(node);
     for (int i = 0; i < node.getChildCount(); i++) {

ReactAndroid/src/main/java/com/facebook/react/uimanager/UIImplementation.java

@@ -21,6 +21,7 @@ import com.facebook.react.bridge.ReadableMap;
 import com.facebook.react.bridge.UiThreadUtil;
 import com.facebook.react.bridge.WritableArray;
 import com.facebook.react.common.ReactConstants;
+import com.facebook.react.config.ReactFeatureFlags;
 import com.facebook.react.modules.i18nmanager.I18nUtil;
 import com.facebook.react.uimanager.debug.NotThreadSafeViewHierarchyUpdateDebugListener;
 import com.facebook.react.uimanager.events.EventDispatcher;
@@ -920,7 +921,9 @@ public class UIImplementation {
       }
     }
     cssNode.markUpdateSeen();
-    mNativeViewHierarchyOptimizer.onViewUpdatesCompleted(cssNode);
+    if (ReactFeatureFlags.enableTransitionLayoutOnlyViewCleanup) {
+      mNativeViewHierarchyOptimizer.onViewUpdatesCompleted(cssNode);
+    }
   }
 
   public void addUIBlock(UIBlock block) {