Move VisionStatus to an event loop

Convert the simulation over to using SimulatedEventLoop as well.

Change-Id: I05d837530f83df5432f056ca5ef6515fbab5f897
diff --git a/y2017/vision/BUILD b/y2017/vision/BUILD
index 25e1285..83447e3 100644
--- a/y2017/vision/BUILD
+++ b/y2017/vision/BUILD
@@ -61,6 +61,7 @@
         ":vision_queue",
         ":vision_result",
         "//aos:init",
+        "//aos/events:shm-event-loop",
         "//aos/logging",
         "//aos/logging:queue_logging",
         "//aos/mutex",