Reland "Add AudioDecoderFactory to NetEqTest constructor."

This is a reland of daa970f33e1923c5651a4a63c18e3d5361d0a795

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: kwiberg@webrtc.org
Bug: webrtc:8396, webrtc:10080
Change-Id: I598ce1cd41676b1992b0973b09476eeeb0e602d2
Reviewed-on: https://webrtc-review.googlesource.com/c/114940
Reviewed-by: Niels Moller <nisse@webrtc.org>
Reviewed-by: Oleh Prypin <oprypin@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26058}
diff --git a/modules/audio_coding/neteq/neteq_unittest.cc b/modules/audio_coding/neteq/neteq_unittest.cc
index 922f9fc..5dd77e5 100644
--- a/modules/audio_coding/neteq/neteq_unittest.cc
+++ b/modules/audio_coding/neteq/neteq_unittest.cc
@@ -1726,8 +1726,9 @@
       new TimeLimitedNetEqInput(std::move(input), 20000));
   std::unique_ptr<AudioSink> output(new VoidAudioSink);
   NetEqTest::Callbacks callbacks;
-  NetEqTest test(config, codecs, ext_codecs, nullptr,
-                 std::move(input_time_limit), std::move(output), callbacks);
+  NetEqTest test(config, CreateBuiltinAudioDecoderFactory(), codecs, ext_codecs,
+                 nullptr, std::move(input_time_limit), std::move(output),
+                 callbacks);
   test.Run();
   const auto stats = test.SimulationStats();
   EXPECT_EQ(0, stats.accelerate_rate);