Some code changes?

Since we dont use mCurentUIMode from AOKP anymore, change to mSystemUiLayout?
Navbar: Bring inline with AOKP frameworks
navbar/navrings: new layouts for nav rings
fixes issues with nav rings in landscape.
We do not use mCurrentUIMode from aokp
we will use mSystemUiLayout like we used before for other fixes,
this commit also seems to fix the recents lag.