Add Statusbar Quick Peek [1/2]

Adds the ability to peek at the statusbar when hidden
by swiping down from the top edge of the screen.

PS 1/3 : Fixed Derp!
PS 4   : Added Fullscreen app support!
PS 5   : Added Pie Detection
PS 6   : Derp forgot the TOP Flag!
PS 7/9 : Some fixes

Change-Id: I4beda91e21518cd2fa391ff1b0fe23ea8e24370e

Conflicts:

	core/java/android/provider/Settings.java
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