Declare example HAL as virtual instance.

Bug: 228638448
Test: manual (see README.md)
Change-Id: I4c00b9e394eb7863416b61662528869f7e70c09d
diff --git a/biometrics/fingerprint/aidl/default/fingerprint-example.xml b/biometrics/fingerprint/aidl/default/fingerprint-example.xml
new file mode 100644
index 0000000..05d1279
--- /dev/null
+++ b/biometrics/fingerprint/aidl/default/fingerprint-example.xml
@@ -0,0 +1,7 @@
+<manifest version="1.0" type="device">
+    <hal format="aidl">
+        <name>android.hardware.biometrics.fingerprint</name>
+        <version>2</version>
+        <fqname>IFingerprint/virtual</fqname>
+    </hal>
+</manifest>