Fingerprint wakeup: don't count failed attempts when screen is off

In wakeup mode we shouldn't register failed attempts to the keygaurd,
otherwise multiple failed attempts can lead to the bouncer showing over
the keyguard when the screen turns on.

Ref: CYNGNOS-895

Change-Id: I0fdde21d5cab54bdf8fd0840d7e3d792ef4e5575
Signed-off-by: Roman Birg <roman@cyngn.com>