Revert of WebRtcVoiceMediaChannel::AddRecvStream: Don't call SetRecPayloadType (patchset #13 id:260001 of https://codereview.webrtc.org/2686043006/ )

Reason for revert:
Makes perf and Chromium FYI bots unhappy.

Original issue's description:
> WebRtcVoiceMediaChannel::AddRecvStream: Don't call SetRecPayloadType
>
> This removes one more place where we were unable to handle codecs not
> in the built-in set.
>
> BUG=webrtc:5805
>
> Review-Url: https://codereview.webrtc.org/2686043006
> Cr-Commit-Position: refs/heads/master@{#17370}
> Committed: 1724cfbdba

TBR=ossu@webrtc.org,solenberg@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:5805

Review-Url: https://codereview.webrtc.org/2772043002
Cr-Commit-Position: refs/heads/master@{#17374}

webrtc/voice_engine/test/auto_test/standard/codec_before_streaming_test.cc

@@ -8,9 +8,7 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "webrtc/voice_engine/channel_proxy.h"
 #include "webrtc/voice_engine/test/auto_test/fixtures/after_initialization_fixture.h"
-#include "webrtc/voice_engine/voice_engine_impl.h"
 
 class CodecBeforeStreamingTest : public AfterInitializationFixture {
  protected:
@@ -21,9 +19,6 @@ class CodecBeforeStreamingTest : public AfterInitializationFixture {
     codec_instance_.pacsize = 480;
 
     channel_ = voe_base_->CreateChannel();
-    static_cast<webrtc::VoiceEngineImpl*>(voice_engine_)
-        ->GetChannelProxy(channel_)
-        ->RegisterLegacyCodecs();
   }
 
   void TearDown() {