Revert of Reimplement the builtin audio codec factories using the new stuff in api/

webrtc/modules/audio_coding/BUILD.gn

Index: webrtc/modules/audio_coding/BUILD.gn
diff --git a/webrtc/modules/audio_coding/BUILD.gn b/webrtc/modules/audio_coding/BUILD.gn
index a3964c90804e9aa0618e65f7dfe0a6fc3887bde1..3e6a1834868daa33c7d2f9f2bf3d8460d665e4df 100644
--- a/webrtc/modules/audio_coding/BUILD.gn
+++ b/webrtc/modules/audio_coding/BUILD.gn
@@ -49,6 +49,34 @@
     "../../api/audio_codecs:audio_codecs_api",
     "../../rtc_base:rtc_base_approved",
   ]
+}
+
+rtc_static_library("builtin_audio_decoder_factory_internal") {
+  sources = [
+    "codecs/builtin_audio_decoder_factory_internal.cc",
+    "codecs/builtin_audio_decoder_factory_internal.h",
+  ]
+  deps = [
+           "../..:webrtc_common",
+           "../../rtc_base:protobuf_utils",
+           "../../rtc_base:rtc_base_approved",
+           "../../api/audio_codecs:audio_codecs_api",
+         ] + audio_codec_deps
+  defines = audio_codec_defines
+}
+
+rtc_static_library("builtin_audio_encoder_factory_internal") {
+  sources = [
+    "codecs/builtin_audio_encoder_factory_internal.cc",
+    "codecs/builtin_audio_encoder_factory_internal.h",
+  ]
+  deps = [
+           "../..:webrtc_common",
+           "../../rtc_base:protobuf_utils",
+           "../../rtc_base:rtc_base_approved",
+           "../../api/audio_codecs:audio_codecs_api",
+         ] + audio_codec_deps
+  defines = audio_codec_defines
 }
 
 rtc_static_library("rent_a_codec") {
@@ -812,13 +840,13 @@
     "../../api/audio_codecs:audio_codecs_api",
     "../../api/audio_codecs/opus:audio_encoder_opus_config",
     "../../common_audio",
+    "../../rtc_base:protobuf_utils",
     "../../rtc_base:rtc_base_approved",
     "../../rtc_base:rtc_numerics",
     "../../system_wrappers",
   ]
   public_deps = [
     ":webrtc_opus_c",
-    "../../rtc_base:protobuf_utils",
   ]
 
   defines = audio_codec_defines