Add 120ms frame ability to ANA

BUG=webrtc:7093

Review-Url: https://codereview.webrtc.org/2669733002
Cr-Commit-Position: refs/heads/master@{#16416}
diff --git a/webrtc/modules/audio_coding/BUILD.gn b/webrtc/modules/audio_coding/BUILD.gn
index 59c166d..00b9aa2 100644
--- a/webrtc/modules/audio_coding/BUILD.gn
+++ b/webrtc/modules/audio_coding/BUILD.gn
@@ -850,7 +850,7 @@
     ":webrtc_opus_c",
   ]
 
-  defines = []
+  defines = audio_codec_defines
   if (rtc_opus_variable_complexity) {
     defines += [ "WEBRTC_OPUS_VARIABLE_COMPLEXITY=1" ]
   } else {