Create XL layouts for incoming, outgoing, exchange

* Create XL fragments (will be shared w/settings)
* Create XL landscape activities
* Create XL portrait activities
* Placeholders left for integration with settings - remove in settings CL
* Quick fixes (non shipping) for phone UX
* Update existing portait next/prev buttons per new wireframes

Bug: 3188940
Change-Id: Ied6e7fd1e968fd6db57607a68dabf7e00ba78ee6
1 file changed