Reland "Remove legacy delay manger field trial and update default config."

This is a reland of 93849d4b2a976b0a46059d6f74d9efd8f12eab92

Original change's description:
> Remove legacy delay manger field trial and update default config.
>
> Bug: webrtc:10333
> Change-Id: I20e55d8d111d93657d1afe556fe3a325337c074c
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/232820
> Reviewed-by: Ivo Creusen <ivoc@webrtc.org>
> Commit-Queue: Jakob Ivarsson <jakobi@webrtc.org>
> Cr-Commit-Position: refs/heads/main@{#35321}

Bug: webrtc:10333
Change-Id: I9b3c732309d32640d15c372a4dde37d5d44c95d1
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/237502
Reviewed-by: Ivo Creusen <ivoc@webrtc.org>
Commit-Queue: Jakob Ivarsson <jakobi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35325}
diff --git a/modules/audio_coding/neteq/neteq_impl.cc b/modules/audio_coding/neteq/neteq_impl.cc
index 45c5229..3696427 100644
--- a/modules/audio_coding/neteq/neteq_impl.cc
+++ b/modules/audio_coding/neteq/neteq_impl.cc
@@ -1370,7 +1370,7 @@
     }
   }
 
-  timestamp_ = end_timestamp;
+  timestamp_ = sync_buffer_->end_timestamp();
   return 0;
 }