Android: Replace webrtc_jni namespace with nested jni namespace

webrtc/sdk/android/src/jni/videofilerenderer_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 <jni.h>
 
 #include "third_party/libyuv/include/libyuv/scale.h"
 #include "webrtc/rtc_base/checks.h"
 #include "webrtc/rtc_base/logging.h"
 
-namespace webrtc_jni {
+namespace webrtc {
+namespace jni {
 
 extern "C" JNIEXPORT void JNICALL
 Java_org_webrtc_VideoFileRenderer_nativeI420Scale(JNIEnv* jni,
                                                   jclass,
                                                   jobject j_src_buffer_y,
                                                   jint j_src_stride_y,
                                                   jobject j_src_buffer_u,
                                                   jint j_src_stride_u,
                                                   jobject j_src_buffer_v,
                                                   jint j_src_stride_v,
@@ skipping 47 matching lines @@
 
 extern "C" JNIEXPORT void JNICALL
 Java_org_webrtc_VideoFileRenderer_nativeFreeNativeByteBuffer(
     JNIEnv* jni,
     jclass,
     jobject byte_buffer) {
   void* data = jni->GetDirectBufferAddress(byte_buffer);
   ::operator delete(data);
 }
 
-}  // namespace webrtc_jni
+}  // namespace jni
+}  // namespace webrtc