This change reduces the overall timing of showing recents to make it
feel more snappy.
It also removes the first item from the list, which is assumed to be
the current app or the home screen, depending on which is currently
showing. This allows the use of muscle memory for switching between
two tasks quickly.
Change-Id: I04713c41ea235483ea4d3f712a84c56b0174394f
d19bedee34