Optionally use fingerprint virtual hal eith BiometricTestSession

Bug: 326227403
Test: adb shell device_config put biometrics_framework
com.android.server.biometrics.use_vhal_for_testing true
Test: atest CtsBiometricsTestCases -c

Change-Id: I99392b128931d203adaafe273648abd92bb65500
2 files changed