Fixed issue where camera wouldn't launch

keyguardIsShowing cassed to NPV#canCameraGestureBeLaunched had the
wrong value because it was checking if SB was expanded visible
but ignoring the fact that bouncer would make it collapse.

Test: launch camera from lock screen
Test: launch camera from bouncer
Test: launch camera from home
Test: launch camera from open activity
Test: launch camera from occluded keyguard
Fixes: 138269798
Change-Id: Id259d42cbd7802614318d8f69c80470419f3b54b