AccessibilityNodeInfo incorrectly cloned.

The code that creates a clone of an AccessibilityNodeInfo was not cloning
the extension objects (CollectionInfo, CollectionItemInfo, and RangeInfo)
and as a result if the original accessibility node info is recycled the
extension objects of the clone are also recycled and now if one tries to
recycle the clone gets an exception that the extension objects are already
recycled. Fun!

bug:10642952

Change-Id: I84192466bff0e865de04b79079e6ceecdffb37a6