Fix 3253629: Tweaks to recent apps

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