Add a reason field to vibrator service

Test: Run vibration test, see reason written to log and trace
Bug: 109654229
Change-Id: I5dbe9a5ff666535f02b5606f18438255ec8a50e8

tests/robotests/src/com/android/settings/biometrics/fingerprint/FingerprintEnrollEnrollingTest.java

@@ -106,6 +106,7 @@ public class FingerprintEnrollEnrollingTest {
                 anyInt(),
                 nullable(String.class),
                 any(VibrationEffect.class),
+                nullable(String.class),
                 nullable(AudioAttributes.class));
     }