[bt][tests] Adding missing dependency

The audio codec tests uses codec factory, but don't depend on it.
In most cases this will end up being fine because codec factory
happens to be included, being a pretty common component, but
could present a problem in certain scenarios.

Change-Id: I416e2e63cf05d033453b3bb36cdc0fc33b77e75c
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/542399
Reviewed-by: Ani Ramakrishnan <aniramakri@google.com>
Commit-Queue: Justin Mattson <jmatt@google.com>
diff --git a/src/connectivity/bluetooth/lib/fuchsia-audio-codec/BUILD.gn b/src/connectivity/bluetooth/lib/fuchsia-audio-codec/BUILD.gn
index 88d4d13..be1bf7f 100644
--- a/src/connectivity/bluetooth/lib/fuchsia-audio-codec/BUILD.gn
+++ b/src/connectivity/bluetooth/lib/fuchsia-audio-codec/BUILD.gn
@@ -54,6 +54,7 @@
   deps = [
     ":fuchsia-audio-codec_test",
     ":test-data",
+    "//src/media/codec:codec_factory",
   ]
 }