SystemUI: fix recents animation in expanded mode.

Change-Id: I63b83763933468c4f1953341aad4317d142e8bb4
SlimRecent: Make it optional [1/2]

PS1: add toggle button between AOSB && Slim Recent
PS2: don't run slim controller if not enabled
PS3: check for correct home listener button

TODO:
Disable Home Longpress
ShutDown Default recent service if slim enabled