Add 120ms frame ability to ANA

webrtc/webrtc.gni

Index: webrtc/webrtc.gni
diff --git a/webrtc/webrtc.gni b/webrtc/webrtc.gni
index 53dcae2b7c862d9b6b3d21b986fa2c763d8050c6..74fc6170cf1175f4ded88da41a584056a8098cd7 100644
--- a/webrtc/webrtc.gni
+++ b/webrtc/webrtc.gni
@@ -17,6 +17,10 @@ declare_args() {
   # Disable this to avoid building the Opus audio codec.
   rtc_include_opus = true
 
+  # Enable this to give the Opus audio codec the possebility to use 120ms
+  # frames.
+  rtc_opus_support_120ms_ptime = false
+
   # Enable this to let the Opus audio codec change complexity on the fly.
   rtc_opus_variable_complexity = false