Convert aos over to flatbuffers

Everything builds, and all the tests pass.  I suspect that some entries
are missing from the config files, but those will be found pretty
quickly on startup.

There is no logging or live introspection of queue messages.

Change-Id: I496ee01ed68f202c7851bed7e8786cee30df29f5
diff --git a/aos/vision/events/BUILD b/aos/vision/events/BUILD
index b887872..a991968 100644
--- a/aos/vision/events/BUILD
+++ b/aos/vision/events/BUILD
@@ -52,6 +52,7 @@
     deps = [
         "//aos:macros",
         "//aos/scoped:scoped_fd",
+        "@com_github_google_glog//:glog",
     ],
 )