Revert "Little fix for swipe to switch"

This reverts commit c7e0faa0ffbbc7997d368384400f42ededf5f7f4.
PIE: Fix random showing of navbar when swiping from top.

We need to condition here aswell to be sure top swipe doesn't trigger up
navbar at all even if we set its height to 0 is an useless call.

Addressing JIRA AOSPA-151 issue.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>
Make swipe to switch default!

Change-Id: I27807eef62a4c4afcac3ec760974617024c88376