Remove use of SetEncodingDataInternal in MediaOptimization.

Add method FilenameWithParams to TestConfig.

Bug: none
Change-Id: I9f683e661537148dc01bee25f7510938fa656dc5
Reviewed-on: https://webrtc-review.googlesource.com/21382
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Commit-Queue: Åsa Persson <asapersson@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20651}

modules/video_coding/codecs/test/test_config.cc

@@ -193,5 +193,11 @@ std::string TestConfig::CodecName() const {
   return codec_name;
 }
 
+std::string TestConfig::FilenameWithParams() const {
+  std::string implementation_type = hw_encoder ? "hw" : "sw";
+  return filename + "_" + CodecName() + "_" + implementation_type + "_" +
+         std::to_string(codec_settings.startBitrate);
+}
+
 }  // namespace test
 }  // namespace webrtc