Frameworks: fix quick peek

only react on a real swipe to avoid accidental show up
on pressing an action on eg ActionBar

as well the pass trough of mPieTop never worked. Not the
problem due that pie is overlaying this part

reduce the settings value write a bit....we need to
be as fast as possible here due that this method is
called on every touch event

PatchSet: minor code correction

Change-Id: Iced268ad043b753d93375439d7835d8570b7649c
Merge "Frameworks: fix quick peek" into jb4.2