Commits
Ari Sachter-Zeltzer authored and Dianne Hackborn committed 7e3357a56d1
[system transitions] + merge all transition work into new branch for commiting to master + new task switching animations to support doc-centric recents + new default activity transitions + new app -> home (wallpaper close) + updated fragment close Change-Id: If055e454e7e7bf11c7d54c8cacad8f7ec52d12d1