Fix Java compilation errors from bad merge

Author: roryabraham

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/scroll/MaintainVisibleScrollPositionHelper.java

@@ -18,6 +18,7 @@
 import com.facebook.react.bridge.UIManagerListener;
 import com.facebook.react.bridge.UiThreadUtil;
 import com.facebook.react.uimanager.UIManagerHelper;
+import com.facebook.react.uimanager.common.UIManagerType;
 import com.facebook.react.uimanager.common.ViewUtil;
 import com.facebook.react.views.scroll.ReactScrollViewHelper.HasSmoothScroll;
 import com.facebook.react.views.view.ReactViewGroup;
@@ -89,6 +90,14 @@ public void stop() {
    * been updated.
    */
   public void updateScrollPosition() {
+    // On Fabric this will be called internally in `didMountItems`.
+    if (ViewUtil.getUIManagerType(mScrollView.getId()) == UIManagerType.FABRIC) {
+      return;
+    }
+    updateScrollPositionInternal();
+  }
+
+  private void updateScrollPositionInternal() {
     if (mConfig == null || mFirstVisibleView == null || mPrevFirstVisibleFrame == null) {
       return;
     }
@@ -169,6 +178,16 @@ public void run() {
         });
   }
 
+  @Override
+  public void willMountItems(UIManager uiManager) {
+    computeTargetView();
+  }
+
+  @Override
+  public void didMountItems(UIManager uiManager) {
+    updateScrollPositionInternal();
+  }
+
   @Override
   public void didDispatchMountItems(UIManager uiManager) {
     // noop

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/scroll/ReactScrollViewManager.java

@@ -333,16 +333,6 @@ public void setMaintainVisibleContentPosition(ReactScrollView view, ReadableMap
     }
   }
 
-  @ReactProp(name = "maintainVisibleContentPosition")
-  public void setMaintainVisibleContentPosition(ReactScrollView view, ReadableMap value) {
-    if (value != null) {
-      view.setMaintainVisibleContentPosition(
-        MaintainVisibleScrollPositionHelper.Config.fromReadableMap(value));
-    } else {
-      view.setMaintainVisibleContentPosition(null);
-    }
-  }
-
   @Override
   public Object updateState(
       ReactScrollView view, ReactStylesDiffMap props, StateWrapper stateWrapper) {