Add viewIsDescendantOf for Android UIManager

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

@@ -445,6 +445,23 @@ public final int getTotalNativeChildren() {
     return mTotalNativeChildren;
   }
 
+  public boolean isDescendantOf(ReactShadowNode ancestorNode) {
+    ReactShadowNode parentNode = getParent();
+
+    boolean isDescendant = false;
+
+    while (parentNode != null) {
+      if (parentNode == ancestorNode) {
+        isDescendant = true;
+        break;
+      } else {
+        parentNode = parentNode.getParent();
+      }
+    }
+
+    return isDescendant;
+  }
+
   /**
    * Returns the offset within the native children owned by all layout-only nodes in the subtree
    * rooted at this node for the given child. Put another way, this returns the number of native

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

@@ -469,6 +469,22 @@ public void findSubviewIn(int reactTag, float targetX, float targetY, Callback c
     mOperationsQueue.enqueueFindTargetForTouch(reactTag, targetX, targetY, callback);
   }
 
+  /**
+   *  Check if the first shadow node is the descendant of the second shadow node
+   */
+  public void viewIsDescendantOf(
+          final int reactTag,
+          final int ancestorReactTag,
+          final Callback callback) {
+    ReactShadowNode node = mShadowNodeRegistry.getNode(reactTag);
+    ReactShadowNode ancestorNode = mShadowNodeRegistry.getNode(ancestorReactTag);
+    if (node == null || ancestorNode == null) {
+      callback.invoke(false);
+      return;
+    }
+    callback.invoke(node.isDescendantOf(ancestorNode));
+  }
+
   /**
    * Determines the location on screen, width, and height of the given view relative to the root
    * view and returns the values via an async callback.

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

@@ -408,6 +408,17 @@ public void findSubviewIn(
       callback);
   }
 
+  /**
+   *  Check if the first shadow node is the descendant of the second shadow node
+   */
+  @ReactMethod
+  public void viewIsDescendantOf(
+          final int reactTag,
+          final int ancestorReactTag,
+          final Callback callback) {
+    mUIImplementation.viewIsDescendantOf(reactTag, ancestorReactTag, callback);
+  }
+
   /**
    * Registers a new Animation that can then be added to a View using {@link #addAnimation}.
    */