Android: Replace webrtc_jni namespace with nested jni namespace

webrtc/sdk/android/src/jni/pc/ownedfactoryandthreads.h

Index: webrtc/sdk/android/src/jni/pc/ownedfactoryandthreads.h
diff --git a/webrtc/sdk/android/src/jni/pc/ownedfactoryandthreads.h b/webrtc/sdk/android/src/jni/pc/ownedfactoryandthreads.h
index 408471ef648f2349b2fe9185c1fc9e89a1c37d58..ce69c121d5b9f143e621fc9c71651cf78a9f73a5 100644
--- a/webrtc/sdk/android/src/jni/pc/ownedfactoryandthreads.h
+++ b/webrtc/sdk/android/src/jni/pc/ownedfactoryandthreads.h
@@ -21,9 +21,9 @@
 using cricket::WebRtcVideoDecoderFactory;
 using cricket::WebRtcVideoEncoderFactory;
 using rtc::Thread;
-using webrtc::PeerConnectionFactoryInterface;
 
-namespace webrtc_jni {
+namespace webrtc {
+namespace jni {
 
 PeerConnectionFactoryInterface* factoryFromJava(jlong j_p);
 
@@ -75,6 +75,7 @@ class OwnedFactoryAndThreads {
   PeerConnectionFactoryInterface* factory_;  // Const after ctor except dtor.
 };
 
-}  // namespace webrtc_jni
+}  // namespace jni
+}  // namespace webrtc
 
 #endif  // WEBRTC_SDK_ANDROID_SRC_JNI_PC_OWNEDFACTORYANDTHREADS_H_