Revert of Break peerconnection_jni.cc into multiple files, in "pc" directory.

webrtc/sdk/android/src/jni/pc/mediastreamtrack_jni.cc

-/*
- *  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.
- */
-
-#include "webrtc/api/mediastreaminterface.h"
-#include "webrtc/sdk/android/src/jni/jni_helpers.h"
-
-namespace webrtc_jni {
-
-JOW(void, MediaStreamTrack_free)(JNIEnv*, jclass, jlong j_p) {
-  reinterpret_cast<webrtc::MediaStreamTrackInterface*>(j_p)->Release();
-}
-
-JOW(jstring, MediaStreamTrack_nativeId)(JNIEnv* jni, jclass, jlong j_p) {
-  return JavaStringFromStdString(
-      jni, reinterpret_cast<webrtc::MediaStreamTrackInterface*>(j_p)->id());
-}
-
-JOW(jstring, MediaStreamTrack_nativeKind)(JNIEnv* jni, jclass, jlong j_p) {
-  return JavaStringFromStdString(
-      jni, reinterpret_cast<webrtc::MediaStreamTrackInterface*>(j_p)->kind());
-}
-
-JOW(jboolean, MediaStreamTrack_nativeEnabled)(JNIEnv* jni, jclass, jlong j_p) {
-  return reinterpret_cast<webrtc::MediaStreamTrackInterface*>(j_p)->enabled();
-}
-
-JOW(jobject, MediaStreamTrack_nativeState)(JNIEnv* jni, jclass, jlong j_p) {
-  return JavaEnumFromIndexAndClassName(
-      jni, "MediaStreamTrack$State",
-      reinterpret_cast<webrtc::MediaStreamTrackInterface*>(j_p)->state());
-}
-
-JOW(jboolean, MediaStreamTrack_nativeSetEnabled)
-(JNIEnv* jni, jclass, jlong j_p, jboolean enabled) {
-  return reinterpret_cast<webrtc::MediaStreamTrackInterface*>(j_p)->set_enabled(
-      enabled);
-}
-
-}  // namespace webrtc_jni