Revert "Pull the Voice Activity Detector out from the AGC"

This reverts commit 518c683f3e413523a458a94b533274bd7f29992d.

Breaks Linux-Asan bot
https://uberchromegw.corp.google.com/i/client.webrtc/builders/Linux%20Asan/builds/4348/steps/libjingle_peerconnection_unittest/logs/stdio

BUG=
TBR=aluebs@webrtc.org

Review URL: https://codereview.webrtc.org/1208793002.

Cr-Commit-Position: refs/heads/master@{#9503}
diff --git a/webrtc/modules/audio_processing/BUILD.gn b/webrtc/modules/audio_processing/BUILD.gn
index dd47429..907f22b 100644
--- a/webrtc/modules/audio_processing/BUILD.gn
+++ b/webrtc/modules/audio_processing/BUILD.gn
@@ -38,9 +38,17 @@
     "aecm/include/echo_control_mobile.h",
     "agc/agc.cc",
     "agc/agc.h",
+    "agc/agc_audio_proc.cc",
+    "agc/agc_audio_proc.h",
+    "agc/agc_audio_proc_internal.h",
     "agc/agc_manager_direct.cc",
     "agc/agc_manager_direct.h",
+    "agc/circular_buffer.cc",
+    "agc/circular_buffer.h",
+    "agc/common.h",
     "agc/gain_map_internal.h",
+    "agc/gmm.cc",
+    "agc/gmm.h",
     "agc/histogram.cc",
     "agc/histogram.h",
     "agc/legacy/analog_agc.c",
@@ -48,8 +56,18 @@
     "agc/legacy/digital_agc.c",
     "agc/legacy/digital_agc.h",
     "agc/legacy/gain_control.h",
+    "agc/noise_gmm_tables.h",
+    "agc/pitch_based_vad.cc",
+    "agc/pitch_based_vad.h",
+    "agc/pitch_internal.cc",
+    "agc/pitch_internal.h",
+    "agc/pole_zero_filter.cc",
+    "agc/pole_zero_filter.h",
+    "agc/standalone_vad.cc",
+    "agc/standalone_vad.h",
     "agc/utility.cc",
     "agc/utility.h",
+    "agc/voice_gmm_tables.h",
     "audio_buffer.cc",
     "audio_buffer.h",
     "audio_processing_impl.cc",
@@ -107,26 +125,6 @@
     "utility/delay_estimator_internal.h",
     "utility/delay_estimator_wrapper.c",
     "utility/delay_estimator_wrapper.h",
-    "vad/common.h",
-    "vad/gmm.cc",
-    "vad/gmm.h",
-    "vad/noise_gmm_tables.h",
-    "vad/pitch_based_vad.cc",
-    "vad/pitch_based_vad.h",
-    "vad/pitch_internal.cc",
-    "vad/pitch_internal.h",
-    "vad/pole_zero_filter.cc",
-    "vad/pole_zero_filter.h",
-    "vad/standalone_vad.cc",
-    "vad/standalone_vad.h",
-    "vad/vad_audio_proc.cc",
-    "vad/vad_audio_proc.h",
-    "vad/vad_audio_proc_internal.h",
-    "vad/vad_circular_buffer.cc",
-    "vad/vad_circular_buffer.h",
-    "vad/voice_activity_detector.cc",
-    "vad/voice_activity_detector.h",
-    "vad/voice_gmm_tables.h",
     "voice_detection_impl.cc",
     "voice_detection_impl.h",
   ]