Add virtual fingerprint instance to policy.

Bug: 228638448
Change-Id: Id9cd3565d731ba98f18e91c50fc19b6820bf3172
Test: N/A
diff --git a/private/service_contexts b/private/service_contexts
index ee5b6a9..0869b0f 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -7,6 +7,7 @@
 android.hardware.automotive.audiocontrol.IAudioControl/default       u:object_r:hal_audiocontrol_service:s0
 android.hardware.biometrics.face.IFace/default                       u:object_r:hal_face_service:s0
 android.hardware.biometrics.fingerprint.IFingerprint/default         u:object_r:hal_fingerprint_service:s0
+android.hardware.biometrics.fingerprint.IFingerprint/virtual         u:object_r:hal_fingerprint_service:s0
 android.hardware.bluetooth.audio.IBluetoothAudioProviderFactory/default u:object_r:hal_audio_service:s0
 # The instance here is internal/0 following naming convention for ICameraProvider.
 # It advertises internal camera devices.