Framework: Fix recents animation bug for all

Sometimes doing some other stuff bring ideas up to solve
problems. Google uses a dirty preload animation hack to
animate recents right....we can do the same just more
generalized.....due that all places (hw keys, navbar, SlimPie
and navring) are calling toggleRecents() I implemented the fix
now there to solve it in general. Due of that this commit
reverts commit 20a905c.
as well

cheers

Change-Id: I48aaa85881d8b177c7223a746bd39925f6826066