Lockscreen : Only animate targets if launched via swipe

If launching via gesture or double tap of power button, showing the
reveal doesn't make much sense and creates visual jank. Only animate
for swipes.

CYNGNOS-2517

Change-Id: I69e1d06c77c12fe39b5ddb01bcc22ed2fff2a9d0
(cherry picked from commit c8bbaca3)