Relanding: Break peerconnection_jni.cc into multiple files, in "pc" directory.

webrtc/sdk/android/src/jni/audio_jni.h

Index: webrtc/sdk/android/src/jni/audio_jni.h
diff --git a/webrtc/sdk/android/src/jni/audio_jni.h b/webrtc/sdk/android/src/jni/audio_jni.h
deleted file mode 100644
index 762d9b8f9b13635a541df1c2062884cb88141177..0000000000000000000000000000000000000000
--- a/webrtc/sdk/android/src/jni/audio_jni.h
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- *  Copyright 2017 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#ifndef WEBRTC_SDK_ANDROID_SRC_JNI_AUDIO_JNI_H_
-#define WEBRTC_SDK_ANDROID_SRC_JNI_AUDIO_JNI_H_
-
-// Adding 'nogncheck' to disable the gn include headers check.
-// We don't want this target depend on audio related targets
-#include "webrtc/api/audio_codecs/audio_decoder_factory.h"  // nogncheck
-#include "webrtc/api/audio_codecs/audio_encoder_factory.h"  // nogncheck
-#include "webrtc/rtc_base/scoped_ref_ptr.h"
-
-namespace webrtc_jni {
-
-rtc::scoped_refptr<webrtc::AudioDecoderFactory> CreateAudioDecoderFactory();
-
-rtc::scoped_refptr<webrtc::AudioEncoderFactory> CreateAudioEncoderFactory();
-
-}  // namespace webrtc_jni
-
-#endif  // WEBRTC_SDK_ANDROID_SRC_JNI_AUDIO_JNI_H_