Frameworks: remove always transparency mode navbar/statusbar 2/2

problem is that the transparency on most app totally break due
that a lot apps do not draw behind navbar and statusbar. Nearly
all user never use always mode and just use it on launcher
and lockcreen. So let us remove it
as well a bit cleanup

Change-Id: Ia5ee97f99102aa2b3833a33eb93b5e428a80b867
Merge "Frameworks: remove always transparency mode navbar/statusbar 2/2" into jb4.3