Accessibility node provider getting invalid virtual view id.

If the virtual child id is not specified we should ask the node
provider to create a node info for the hosting view bu passing
the special host node id.

bug:17664111

Change-Id: Iaf1387acdfe33b50b50729d293adcdf82340a648

Author: sganov

core/java/android/view/AccessibilityInteractionController.java

@@ -1138,7 +1138,7 @@ private void prefetchSiblingsOfVirtualNode(AccessibilityNodeInfo current, View p
             if (parentVirtualDescendantId != AccessibilityNodeInfo.UNDEFINED_ITEM_ID
                     || parentAccessibilityViewId == providerHost.getAccessibilityViewId()) {
                 final AccessibilityNodeInfo parent;
-                if (parentAccessibilityViewId != AccessibilityNodeInfo.UNDEFINED_ITEM_ID) {
+                if (parentVirtualDescendantId != AccessibilityNodeInfo.UNDEFINED_ITEM_ID) {
                     parent = provider.createAccessibilityNodeInfo(parentVirtualDescendantId);
                 } else {
                     parent = provider.createAccessibilityNodeInfo(