Add hongchan to owners

This module is primarily to add FFT support for WebAudio on Android.
Add some WebAudio OWNERS as an owner of this repo.

Change-Id: Iaa2902645d59c634969e834614388ee7c36e9962
Reviewed-on: https://webrtc-review.googlesource.com/c/119000
Reviewed-by: Nico Weber <thakis@chromium.org>

OWNERS

diff --git a/OWNERS b/OWNERS
index 5e3e77e..72eed8c 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,2 +1,6 @@
-kma@google.com
+# At the very least, the webaudio team should be owners.  For
+# suggestions, see
+# chromium/src/third_party/blink/renderer/modules/webaudio/OWNERS
+
+hochchan@google.com
 rtoy@google.com