Android: Replace webrtc_jni namespace with nested jni namespace

webrtc/modules/video_coding/codecs/test/android_test_initializer.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.
  */
 
@@ skipping 22 matching lines @@
 
 // There can only be one JNI_OnLoad in each binary. So since this is a GTEST
 // C++ runner binary, we want to initialize the same global objects we normally
 // do if this had been a Java binary.
 void EnsureInitializedOnce() {
   RTC_CHECK(::base::android::IsVMInitialized());
   JNIEnv* jni = ::base::android::AttachCurrentThread();
   JavaVM* jvm = NULL;
   RTC_CHECK_EQ(0, jni->GetJavaVM(&jvm));
 
-  jint ret = webrtc_jni::InitGlobalJniVariables(jvm);
+  jint ret = jni::InitGlobalJniVariables(jvm);
   RTC_DCHECK_GE(ret, 0);
 
-  webrtc_jni::LoadGlobalClassReferenceHolder();
+  jni::LoadGlobalClassReferenceHolder();
 }
 
 }  // namespace
 
 void InitializeAndroidObjects() {
   RTC_CHECK_EQ(0, pthread_once(&g_initialize_once, &EnsureInitializedOnce));
 }
 
 }  // namespace webrtc