Revert "Remove CodecInst pt.1"

This reverts commit 056f9738bf7a3d16da45398239656e165c4e0851.

Reason for revert: breaks downstream

Original change's description:
> Remove CodecInst pt.1
> 
> Update audio_coding tests to not use CodecInst.
> 
> Bug: webrtc:7626
> Change-Id: I880fb8d72d7d0a915d274e67feb6106f023697c2
> Reviewed-on: https://webrtc-review.googlesource.com/c/112594
> Commit-Queue: Fredrik Solenberg <solenberg@webrtc.org>
> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#25879}

TBR=solenberg@webrtc.org,kwiberg@webrtc.org

Change-Id: I51d666969bcd63e2b7cb7d669ec2f59b5f8f9dde
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: webrtc:7626
Reviewed-on: https://webrtc-review.googlesource.com/c/112906
Reviewed-by: Fredrik Solenberg <solenberg@webrtc.org>
Commit-Queue: Fredrik Solenberg <solenberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25881}
diff --git a/modules/audio_coding/test/target_delay_unittest.cc b/modules/audio_coding/test/target_delay_unittest.cc
index 8d82b6e..071a6d8 100644
--- a/modules/audio_coding/test/target_delay_unittest.cc
+++ b/modules/audio_coding/test/target_delay_unittest.cc
@@ -12,8 +12,10 @@
 
 #include "api/audio/audio_frame.h"
 #include "api/audio_codecs/builtin_audio_decoder_factory.h"
+#include "common_types.h"  // NOLINT(build/include)
 #include "modules/audio_coding/codecs/pcm16b/pcm16b.h"
 #include "modules/audio_coding/include/audio_coding_module.h"
+#include "modules/audio_coding/test/utility.h"
 #include "modules/include/module_common_types.h"
 #include "test/gtest.h"
 #include "test/testsupport/fileutils.h"
@@ -33,9 +35,8 @@
 
     ASSERT_EQ(0, acm_->InitializeReceiver());
     constexpr int pltype = 108;
-    std::map<int, SdpAudioFormat> receive_codecs =
-        {{pltype, {"L16", kSampleRateHz, 1}}};
-    acm_->SetReceiveCodecs(receive_codecs);
+    ASSERT_EQ(true,
+              acm_->RegisterReceiveCodec(pltype, {"L16", kSampleRateHz, 1}));
 
     rtp_info_.header.payloadType = pltype;
     rtp_info_.header.timestamp = 0;