Android: Replace webrtc_jni namespace with nested jni namespace

webrtc/sdk/android/src/jni/pc/callsessionfilerotatinglogsink_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/rtc_base/logsinks.h"
 #include "webrtc/sdk/android/src/jni/jni_helpers.h"
 
-namespace webrtc_jni {
+namespace webrtc {
+namespace jni {
 
 JNI_FUNCTION_DECLARATION(jlong,
                          CallSessionFileRotatingLogSink_nativeAddSink,
                          JNIEnv* jni,
                          jclass,
                          jstring j_dirPath,
                          jint j_maxFileSize,
                          jint j_severity) {
   std::string dir_path = JavaToStdString(jni, j_dirPath);
   rtc::CallSessionFileRotatingLogSink* sink =
@@ skipping 44 matching lines @@
   size_t read = 0;
   std::unique_ptr<jbyte> buffer(static_cast<jbyte*>(malloc(log_size)));
   stream->ReadAll(buffer.get(), log_size, &read, nullptr);
 
   jbyteArray result = jni->NewByteArray(read);
   jni->SetByteArrayRegion(result, 0, read, buffer.get());
 
   return result;
 }
 
-}  // namespace webrtc_jni
+}  // namespace jni
+}  // namespace webrtc