Fix missing KeepForApi for ReflectiveEventType

Change-Id: I6241ae7cb9b925da03839c42d44319b3fa029585
diff --git a/src/assistant/java/com/android/tools/r8/assistant/runtime/ReflectiveEventType.java b/src/assistant/java/com/android/tools/r8/assistant/runtime/ReflectiveEventType.java
index 78ab383..7b8b3eb 100644
--- a/src/assistant/java/com/android/tools/r8/assistant/runtime/ReflectiveEventType.java
+++ b/src/assistant/java/com/android/tools/r8/assistant/runtime/ReflectiveEventType.java
@@ -4,6 +4,9 @@
 
 package com.android.tools.r8.assistant.runtime;
 
+import com.android.tools.r8.keepanno.annotations.KeepForApi;
+
+@KeepForApi
 public enum ReflectiveEventType {
   CLASS_NEW_INSTANCE,
   CLASS_GET_DECLARED_METHOD,