Android: Replace webrtc_jni namespace with nested jni namespace

webrtc/sdk/android/src/jni/pc/ownedfactoryandthreads.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/sdk/android/src/jni/pc/ownedfactoryandthreads.h"
 
 #include "webrtc/rtc_base/logging.h"
 #include "webrtc/sdk/android/src/jni/classreferenceholder.h"
 #include "webrtc/sdk/android/src/jni/jni_helpers.h"
 
-namespace webrtc_jni {
+namespace webrtc {
+namespace jni {
 
 PeerConnectionFactoryInterface* factoryFromJava(jlong j_p) {
   return reinterpret_cast<OwnedFactoryAndThreads*>(j_p)->factory();
 }
 
 OwnedFactoryAndThreads::~OwnedFactoryAndThreads() {
   CHECK_RELEASE(factory_);
   if (network_monitor_factory_ != nullptr) {
     rtc::NetworkMonitorFactory::ReleaseFactory(network_monitor_factory_);
   }
@@ skipping 26 matching lines @@
 void OwnedFactoryAndThreads::InvokeJavaCallbacksOnFactoryThreads() {
   LOG(LS_INFO) << "InvokeJavaCallbacksOnFactoryThreads.";
   network_thread_->Invoke<void>(RTC_FROM_HERE,
                                 [this] { JavaCallbackOnFactoryThreads(); });
   worker_thread_->Invoke<void>(RTC_FROM_HERE,
                                [this] { JavaCallbackOnFactoryThreads(); });
   signaling_thread_->Invoke<void>(RTC_FROM_HERE,
                                   [this] { JavaCallbackOnFactoryThreads(); });
 }
 
-}  // namespace webrtc_jni
+}  // namespace jni
+}  // namespace webrtc