Add user activity event type for accessibility.

Bug: 19531976
Change-Id: I95096dbf252556e677a8a9f3bffe8abaab353ab4
diff --git a/include/powermanager/PowerManager.h b/include/powermanager/PowerManager.h
index cbddc11..3268b45 100644
--- a/include/powermanager/PowerManager.h
+++ b/include/powermanager/PowerManager.h
@@ -28,8 +28,9 @@
     USER_ACTIVITY_EVENT_OTHER = 0,
     USER_ACTIVITY_EVENT_BUTTON = 1,
     USER_ACTIVITY_EVENT_TOUCH = 2,
+    USER_ACTIVITY_EVENT_ACCESSIBILITY = 3,
 
-    USER_ACTIVITY_EVENT_LAST = USER_ACTIVITY_EVENT_TOUCH, // Last valid event code.
+    USER_ACTIVITY_EVENT_LAST = USER_ACTIVITY_EVENT_ACCESSIBILITY, // Last valid event code.
 };
 
 }; // namespace android