This changes the FragmentLayout demo to show how the layout
(and entire UI flow) can easily be changed based on screen configuration
using fragments. Here we have different UI for landscape vs portrait.
The old FragmentLayout demo is renamed to FragmentAnim and extended a
bit.
Various other tweaks to follow fragment API changes.
Change-Id: I8df918dbf32b3617cae2b20f77eb37d8211b8c89