Android: Replace webrtc_jni namespace with nested jni namespace

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

Index: webrtc/sdk/android/src/jni/pc/audio_jni.cc
diff --git a/webrtc/sdk/android/src/jni/pc/audio_jni.cc b/webrtc/sdk/android/src/jni/pc/audio_jni.cc
index e182e42e3130f9bd06f23faeba98edcf9da05b65..6bd7df5240b19f2463c55d086f5c8656495b21a5 100644
--- a/webrtc/sdk/android/src/jni/pc/audio_jni.cc
+++ b/webrtc/sdk/android/src/jni/pc/audio_jni.cc
@@ -13,14 +13,16 @@
 #include "webrtc/api/audio_codecs/builtin_audio_decoder_factory.h"
 #include "webrtc/api/audio_codecs/builtin_audio_encoder_factory.h"
 
-namespace webrtc_jni {
+namespace webrtc {
+namespace jni {
 
-rtc::scoped_refptr<webrtc::AudioDecoderFactory> CreateAudioDecoderFactory() {
-  return webrtc::CreateBuiltinAudioDecoderFactory();
+rtc::scoped_refptr<AudioDecoderFactory> CreateAudioDecoderFactory() {
+  return CreateBuiltinAudioDecoderFactory();
 }
 
-rtc::scoped_refptr<webrtc::AudioEncoderFactory> CreateAudioEncoderFactory() {
-  return webrtc::CreateBuiltinAudioEncoderFactory();
+rtc::scoped_refptr<AudioEncoderFactory> CreateAudioEncoderFactory() {
+  return CreateBuiltinAudioEncoderFactory();
 }
 
-}  // namespace webrtc_jni
+}  // namespace jni
+}  // namespace webrtc