Fix define if chain in audio decoder unittest

Follow up https://webrtc-review.googlesource.com/c/src/+/228247. Turned out "#elif defined(WEBRTC_MAC) && defined(WEBRTC_ARCH_ARM64)  // M1 Mac" branch was unreachable

Bug: webrtc:13053
Change-Id: Icf1aa5147347a1fad0dce8cca893bb3c598f658e
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/228381
Reviewed-by: Henrik Lundin <henrik.lundin@webrtc.org>
Commit-Queue: Andrey Logvin <landrey@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34699}
diff --git a/modules/audio_coding/neteq/audio_decoder_unittest.cc b/modules/audio_coding/neteq/audio_decoder_unittest.cc
index f01a1a6..ac0e48e 100644
--- a/modules/audio_coding/neteq/audio_decoder_unittest.cc
+++ b/modules/audio_coding/neteq/audio_decoder_unittest.cc
@@ -589,10 +589,10 @@
   int delay = 54;  // Delay from input to output.
 #if defined(WEBRTC_ANDROID) && defined(WEBRTC_ARCH_ARM)
   static const int kEncodedBytes = 685;
-#elif defined(WEBRTC_ARCH_ARM64)
-  static const int kEncodedBytes = 673;
 #elif defined(WEBRTC_MAC) && defined(WEBRTC_ARCH_ARM64)  // M1 Mac
   static const int kEncodedBytes = 684;
+#elif defined(WEBRTC_ARCH_ARM64)
+  static const int kEncodedBytes = 673;
 #elif defined(WEBRTC_WIN) && defined(_MSC_VER) && !defined(__clang__)
   static const int kEncodedBytes = 671;
 #elif defined(WEBRTC_IOS) && defined(WEBRTC_ARCH_X86_64)