Enable using a custom NetEqFactory in simulations

Bug: webrtc:11005
Change-Id: I8a15f77953cbd3c29a75c7cfc77f926b138994b9
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/165580
Commit-Queue: Ivo Creusen <ivoc@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30286}

test/fuzzers/neteq_rtp_fuzzer.cc

@@ -138,7 +138,8 @@ void FuzzOneInputTest(const uint8_t* data, size_t size) {
   RTC_CHECK(it != codecs.end());
   RTC_CHECK(it->second == SdpAudioFormat("L16", 32000, 1));
 
-  NetEqTest test(config, CreateBuiltinAudioDecoderFactory(), codecs, nullptr,
+  NetEqTest test(config, CreateBuiltinAudioDecoderFactory(), codecs,
+                 /*text_log=*/nullptr, /*neteq_factory=*/nullptr,
                  std::move(input), std::move(output), callbacks);
   test.Run();
 }