Temporary Fix to return the Layer as a View when Parent is a Layer.

Temporary Fix to return the Layer as a View when Parent is a Layer.

There are three different changes in this patch.
  1: Creating and Returning View if it was a Layer.
  2: Don't register (and unregister) managed object if it is a duplicate copy of existing ref object.
  3: Avoid creating RootLayer managed object multiple times by having global variable in Window class.

Change-Id: I0e0805dd542bbae3f32d7e047bc7792ec37e1d79