docs: Added link to "preparing for multiwindow" blog post am: d93472b am: 5db4e1f
am: 04b4190

* commit '04b41903f9c4ceebc0f5d2e03f8f921f5dc95e69':

Change-Id: I789b9b1066978a665b1262e46a8331c07cd7e9c3