Fixed mistake in DelayBasedBwe. Use audio_inter_arrival_delta_ when separate audio is enabled.

Bug: None
Change-Id: Ie657126a89d3a9177d2b76e876afa5da8cac9d48
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/266490
Commit-Queue: Björn Terelius <terelius@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Diep Bui <diepbp@webrtc.org>
Reviewed-by: Ying Wang <yinwa@webrtc.org>
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#37638}
diff --git a/AUTHORS b/AUTHORS
index cfc744f..8f1df31 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -80,6 +80,7 @@
 Michel Promonet <michel.promonet.1@gmail.com>
 Miguel Paris <mparisdiaz@gmail.com>
 Mike Gilbert <floppymaster@gmail.com>
+Mike Wei <Mike.WeiB@gmail.com>
 Min Wang <mingewang@gmail.com>
 Mo Zanaty <mzanaty@cisco.com>
 Nico Schlumprecht <me@github.nico.onl>