Android: Replace webrtc_jni namespace with nested jni namespace

webrtc/examples/unityplugin/jni_onload.cc

Index: webrtc/examples/unityplugin/jni_onload.cc
diff --git a/webrtc/examples/unityplugin/jni_onload.cc b/webrtc/examples/unityplugin/jni_onload.cc
index b8b4adf367d60edfedaed748871fbf7a4e02104f..558dcfbf92e48f9e0230d635a2c9d258586f63f9 100644
--- a/webrtc/examples/unityplugin/jni_onload.cc
+++ b/webrtc/examples/unityplugin/jni_onload.cc
@@ -17,7 +17,8 @@
 #include "webrtc/sdk/android/src/jni/classreferenceholder.h"
 #include "webrtc/sdk/android/src/jni/jni_helpers.h"
 
-namespace webrtc_jni {
+namespace webrtc {
+namespace jni {
 
 extern "C" jint JNIEXPORT JNICALL JNI_OnLoad(JavaVM* jvm, void* reserved) {
   jint ret = InitGlobalJniVariables(jvm);
@@ -38,4 +39,5 @@ extern "C" void JNIEXPORT JNICALL JNI_OnUnLoad(JavaVM* jvm, void* reserved) {
   RTC_CHECK(rtc::CleanupSSL()) << "Failed to CleanupSSL()";
 }
 
-}  // namespace webrtc_jni
+}  // namespace jni
+}  // namespace webrtc