Revert "Add AudioDecoderFactory to NetEqTest constructor."

This reverts commit daa970f33e1923c5651a4a63c18e3d5361d0a795.

Reason for revert: Speculative revert due to downstream breakage

Original change's description:
> Add AudioDecoderFactory to NetEqTest constructor.
>
> Update EventLogAnalyzer to not depend on builtin audio decoders.
>
> Bug: webrtc:8396, webrtc:10080
> Change-Id: Ie02ed9cda6d4f11bfdf2e65eb6482283b7520738
> Reviewed-on: https://webrtc-review.googlesource.com/c/114301
> Reviewed-by: Alex Loiko <aleloi@webrtc.org>
> Reviewed-by: Ivo Creusen <ivoc@webrtc.org>
> Reviewed-by: Björn Terelius <terelius@webrtc.org>
> Commit-Queue: Niels Moller <nisse@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#26026}

TBR=mbonadei@webrtc.org,aleloi@webrtc.org,kwiberg@webrtc.org,terelius@webrtc.org,nisse@webrtc.org,ivoc@webrtc.org

No-Try: True
Bug: webrtc:8396, webrtc:10080
Change-Id: Ided750d8ed800d8a38f7cce8f72095d8ed1bc6cb
Reviewed-on: https://webrtc-review.googlesource.com/c/114552
Commit-Queue: Oleh Prypin <oprypin@webrtc.org>
Reviewed-by: Oleh Prypin <oprypin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26030}
diff --git a/modules/audio_coding/neteq/tools/neteq_test.cc b/modules/audio_coding/neteq/tools/neteq_test.cc
index 90d4979..a3c3ffa 100644
--- a/modules/audio_coding/neteq/tools/neteq_test.cc
+++ b/modules/audio_coding/neteq/tools/neteq_test.cc
@@ -13,6 +13,7 @@
 #include <iomanip>
 #include <iostream>
 
+#include "api/audio_codecs/builtin_audio_decoder_factory.h"
 #include "modules/rtp_rtcp/source/byte_io.h"
 
 namespace webrtc {
@@ -51,14 +52,13 @@
 }
 
 NetEqTest::NetEqTest(const NetEq::Config& config,
-                     rtc::scoped_refptr<AudioDecoderFactory> decoder_factory,
                      const DecoderMap& codecs,
                      const ExtDecoderMap& ext_codecs,
                      std::unique_ptr<std::ofstream> text_log,
                      std::unique_ptr<NetEqInput> input,
                      std::unique_ptr<AudioSink> output,
                      Callbacks callbacks)
-    : neteq_(NetEq::Create(config, decoder_factory)),
+    : neteq_(NetEq::Create(config, CreateBuiltinAudioDecoderFactory())),
       input_(std::move(input)),
       output_(std::move(output)),
       callbacks_(callbacks),