SSE2 and NEON kill switches for AGC2

Bug: webrtc:7494
Change-Id: I221b717b5cf3c41b7b637e9234d1e339a0e6c7e5
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/199967
Reviewed-by: Sam Zackrisson <saza@webrtc.org>
Commit-Queue: Alessio Bazzica <alessiob@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32918}
diff --git a/modules/audio_processing/include/audio_processing.h b/modules/audio_processing/include/audio_processing.h
index 802ff9d..5a0e1df 100644
--- a/modules/audio_processing/include/audio_processing.h
+++ b/modules/audio_processing/include/audio_processing.h
@@ -365,7 +365,9 @@
         int gain_applier_adjacent_speech_frames_threshold = 1;
         float max_gain_change_db_per_second = 3.f;
         float max_output_noise_level_dbfs = -50.f;
+        bool sse2_allowed = true;
         bool avx2_allowed = true;
+        bool neon_allowed = true;
       } adaptive_digital;
     } gain_controller2;