Change ActionBar animtion from/to ActionMode - support edition

This CL changes the animation going from/to ActionMode per UX request.
The previous animation uses a combination of scale and translation
animation, whereas the new animation uses fade-out and then fade-in
(no cross-fade) for the action bar transition.

Also removed any internal code support split action bars.
AppCompat does not support it is not used.

Bug: 20882034

Change-Id: I65d39fd785cbd7c80357fae7411350100225eb5f
7 files changed