Update fingerprint SensorLocation interface for multi-display

Allows the implementation to specify location relative to multiple
displays (instead of just one), from which the sensor is accessible
from.

Fixes: 174868353
Test: make -j android.hardware.biometrics.fingerprint-update-api
Test: make -j android.hardware.biometrics.fingerprint-service.example

Change-Id: I0d1c1d2bdc0ea817656c14b3b79381db994fdd75