Add PeerConnection option to enable RTX handling in the audio jitter buffer.

Bug: webrtc:10178
Change-Id: I70abce0c7b74124d2b1978d9a5eb8216b6233d1a
Reviewed-on: https://webrtc-review.googlesource.com/c/116784
Commit-Queue: Jakob Ivarsson‎ <jakobi@webrtc.org>
Reviewed-by: Minyue Li <minyue@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26203}

api/audio_options.cc

diff --git a/api/audio_options.cc b/api/audio_options.cc
index 6fd90b2..16c0430 100644
--- a/api/audio_options.cc
+++ b/api/audio_options.cc
@@ -52,6 +52,8 @@
           change.audio_jitter_buffer_fast_accelerate);
   SetFrom(&audio_jitter_buffer_min_delay_ms,
           change.audio_jitter_buffer_min_delay_ms);
+  SetFrom(&audio_jitter_buffer_enable_rtx_handling,
+          change.audio_jitter_buffer_enable_rtx_handling);
   SetFrom(&typing_detection, change.typing_detection);
   SetFrom(&experimental_agc, change.experimental_agc);
   SetFrom(&extended_filter_aec, change.extended_filter_aec);
@@ -81,6 +83,8 @@
              o.audio_jitter_buffer_fast_accelerate &&
          audio_jitter_buffer_min_delay_ms ==
              o.audio_jitter_buffer_min_delay_ms &&
+         audio_jitter_buffer_enable_rtx_handling ==
+             o.audio_jitter_buffer_enable_rtx_handling &&
          typing_detection == o.typing_detection &&
          experimental_agc == o.experimental_agc &&
          extended_filter_aec == o.extended_filter_aec &&
@@ -114,6 +118,8 @@
                 audio_jitter_buffer_fast_accelerate);
   ToStringIfSet(&result, "audio_jitter_buffer_min_delay_ms",
                 audio_jitter_buffer_min_delay_ms);
+  ToStringIfSet(&result, "audio_jitter_buffer_enable_rtx_handling",
+                audio_jitter_buffer_enable_rtx_handling);
   ToStringIfSet(&result, "typing", typing_detection);
   ToStringIfSet(&result, "experimental_agc", experimental_agc);
   ToStringIfSet(&result, "extended_filter_aec", extended_filter_aec);