FP won't wake device if daemon dies

Keyguard should retry FP auth if HW unavailable occurs

Fixes: 37483809

Test: enroll FP, turn off screen (enter keyguard)
pid biometrics | xargs adb shell kill -9
after 3 seconds, FP should be able to auth again

Change-Id: Ied3a4c07de655f3145ad40e3b73078fe9b161291