Fix shadowColor and outline prop defaults in BaseViewManagerDelegate

BaseViewManagerDelegate reset shadowColor to 0 and outlineOffset and
outlineWidth to YogaConstants.UNDEFINED when the props were removed,
instead of the @ReactProp defaults in BaseViewManager (Color.BLACK and
0f). On components with a codegen delegate, removing shadowColor hid the
elevation shadow and removing outlineOffset hid the outline.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: shubh73

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/BaseViewManagerDelegate.kt

@@ -7,6 +7,7 @@
 
 package com.facebook.react.uimanager
 
+import android.graphics.Color
 import android.view.View
 import com.facebook.react.bridge.ColorPropConverter
 import com.facebook.react.bridge.Dynamic
@@ -89,7 +90,10 @@ public abstract class BaseViewManagerDelegate<
       ViewProps.MIX_BLEND_MODE -> mViewManager.setMixBlendMode(view, value as String?)
 
       ViewProps.SHADOW_COLOR ->
-          mViewManager.setShadowColor(view, ColorPropConverter.getColor(value, view.context, 0))
+          mViewManager.setShadowColor(
+              view,
+              ColorPropConverter.getColor(value, view.context, Color.BLACK),
+          )
 
       ViewProps.IMPORTANT_FOR_ACCESSIBILITY ->
           mViewManager.setImportantForAccessibility(view, value as String?)
@@ -113,18 +117,12 @@ public abstract class BaseViewManagerDelegate<
           )
 
       ViewProps.OUTLINE_OFFSET ->
-          mViewManager.setOutlineOffset(
-              view,
-              (value as Double?)?.toFloat() ?: YogaConstants.UNDEFINED,
-          )
+          mViewManager.setOutlineOffset(view, (value as Double?)?.toFloat() ?: 0.0f)
 
       ViewProps.OUTLINE_STYLE -> mViewManager.setOutlineStyle(view, value as String?)
 
       ViewProps.OUTLINE_WIDTH ->
-          mViewManager.setOutlineWidth(
-              view,
-              (value as Double?)?.toFloat() ?: YogaConstants.UNDEFINED,
-          )
+          mViewManager.setOutlineWidth(view, (value as Double?)?.toFloat() ?: 0.0f)
 
       ViewProps.RENDER_TO_HARDWARE_TEXTURE ->
           mViewManager.setRenderToHardwareTexture(view, value as Boolean? ?: false)

packages/react-native/ReactAndroid/src/test/java/com/facebook/react/uimanager/BaseViewManagerDelegateTest.java

@@ -10,6 +10,7 @@
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.verify;
 
+import android.graphics.Color;
 import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.bridge.ReactTestHelper;
 import com.facebook.react.internal.featureflags.ReactNativeFeatureFlags;
@@ -60,4 +61,25 @@ public void setOutlineColorPreservesNull() {
 
     verify(viewManager).setOutlineColor(view, null);
   }
+
+  @Test
+  public void setShadowColorResetsToBlack() {
+    delegate.setProperty(view, ViewProps.SHADOW_COLOR, null);
+
+    verify(viewManager).setShadowColor(view, Color.BLACK);
+  }
+
+  @Test
+  public void setOutlineOffsetResetsToZero() {
+    delegate.setProperty(view, ViewProps.OUTLINE_OFFSET, null);
+
+    verify(viewManager).setOutlineOffset(view, 0f);
+  }
+
+  @Test
+  public void setOutlineWidthResetsToZero() {
+    delegate.setProperty(view, ViewProps.OUTLINE_WIDTH, null);
+
+    verify(viewManager).setOutlineWidth(view, 0f);
+  }
 }