Include absl/memory/memory.h if absl::make_unique is used

Tbr: kwiberg@webrtc.org
Bug: None
Change-Id: Iaf4533d2ce0e80b351a8a664ef8cf7ba0e5ec583
Reviewed-on: https://webrtc-review.googlesource.com/c/115746
Commit-Queue: Steve Anton <steveanton@webrtc.org>
Reviewed-by: Yves Gerey <yvesg@google.com>
Reviewed-by: Oleh Prypin <oprypin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26168}
diff --git a/modules/audio_coding/test/TestRedFec.cc b/modules/audio_coding/test/TestRedFec.cc
index ac51666..b284205 100644
--- a/modules/audio_coding/test/TestRedFec.cc
+++ b/modules/audio_coding/test/TestRedFec.cc
@@ -12,6 +12,7 @@
 
 #include <utility>
 
+#include "absl/memory/memory.h"
 #include "absl/strings/match.h"
 #include "api/audio_codecs/L16/audio_decoder_L16.h"
 #include "api/audio_codecs/L16/audio_encoder_L16.h"