Adopt absl::string_view in modules/audio_coding/

Bug: webrtc:13579
Change-Id: Ifec66fb6ba9724d18539de7245a358c2d13c7939
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/268547
Reviewed-by: Ivo Creusen <ivoc@webrtc.org>
Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org>
Commit-Queue: Ali Tofigh <alito@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#37573}
diff --git a/modules/audio_coding/test/PacketLossTest.cc b/modules/audio_coding/test/PacketLossTest.cc
index 727f692..799e9c5 100644
--- a/modules/audio_coding/test/PacketLossTest.cc
+++ b/modules/audio_coding/test/PacketLossTest.cc
@@ -12,6 +12,7 @@
 
 #include <memory>
 
+#include "absl/strings/string_view.h"
 #include "api/audio_codecs/builtin_audio_decoder_factory.h"
 #include "rtc_base/strings/string_builder.h"
 #include "test/gtest.h"
@@ -28,7 +29,7 @@
 
 void ReceiverWithPacketLoss::Setup(AudioCodingModule* acm,
                                    RTPStream* rtpStream,
-                                   std::string out_file_name,
+                                   absl::string_view out_file_name,
                                    int channels,
                                    int file_num,
                                    int loss_rate,
@@ -89,7 +90,7 @@
 
 void SenderWithFEC::Setup(AudioCodingModule* acm,
                           RTPStream* rtpStream,
-                          std::string in_file_name,
+                          absl::string_view in_file_name,
                           int payload_type,
                           SdpAudioFormat format,
                           int expected_loss_rate) {