Fixed a regression where one couldn't go to the keyguard anymore

View.animate().setListener is quite dangerous as that it never
is unset automatically. We're now explicitely unsetting it
after one instance

Fixes: 204286169
Bug: 202630143
Test: atest packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/UnlockedScreenOffAnimationControllerTest.kt
Change-Id: I9984863d0acea1265d09dfcfac22d5e78c73a1fe