Mark USAGE_NOTIFICATION_EVENT vibrations as notifications

Non-notification background vibrations are ignored. However, we don't
want to ignore notifications that represent various events, such as
reminders.
Test: Create a calendar event with a reminder. Close calendar and wait
for reminder. The device should vibrate when the reminder pops up.
Bug: 139523314

Change-Id: I231239daf7cc85bf69aaeef1da31218a23fcf311
diff --git a/services/core/java/com/android/server/VibratorService.java b/services/core/java/com/android/server/VibratorService.java
index 0748279..9936d73 100644
--- a/services/core/java/com/android/server/VibratorService.java
+++ b/services/core/java/com/android/server/VibratorService.java
@@ -1188,6 +1188,7 @@
     private static boolean isNotification(int usageHint) {
         switch (usageHint) {
             case AudioAttributes.USAGE_NOTIFICATION:
+            case AudioAttributes.USAGE_NOTIFICATION_EVENT:
             case AudioAttributes.USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
             case AudioAttributes.USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
             case AudioAttributes.USAGE_NOTIFICATION_COMMUNICATION_DELAYED: