Use -Werror in hardware/interfaces/biometrics/fingerprint

* Fix warning of unused function call result.

Bug: 66996870
Test: build with WITH_TIDY=1
Change-Id: I91da207b80d0715d015195357d645f8cf324fa1e
diff --git a/biometrics/fingerprint/2.1/default/Android.bp b/biometrics/fingerprint/2.1/default/Android.bp
index e1d2cf7..b12ce61 100644
--- a/biometrics/fingerprint/2.1/default/Android.bp
+++ b/biometrics/fingerprint/2.1/default/Android.bp
@@ -1,5 +1,6 @@
 cc_binary {
     name: "android.hardware.biometrics.fingerprint@2.1-service",
+    defaults: ["hidl_defaults"],
     init_rc: ["android.hardware.biometrics.fingerprint@2.1-service.rc"],
     vendor: true,
     relative_install_path: "hw",