Revert of Break peerconnection_jni.cc into multiple files, in "pc" directory.

webrtc/sdk/android/src/jni/jni_helpers.cc

Index: webrtc/sdk/android/src/jni/jni_helpers.cc
diff --git a/webrtc/sdk/android/src/jni/jni_helpers.cc b/webrtc/sdk/android/src/jni/jni_helpers.cc
index 9101b276f7a35211546d3fd4c81960699117ec4a..8860f06d5aeab6ee0fbd405db7df263ee8634ecc 100644
--- a/webrtc/sdk/android/src/jni/jni_helpers.cc
+++ b/webrtc/sdk/android/src/jni/jni_helpers.cc
@@ -273,14 +273,6 @@
   return ret;
 }
 
-jobject JavaEnumFromIndexAndClassName(JNIEnv* jni,
-                                      const std::string& state_class_fragment,
-                                      int index) {
-  const std::string state_class = "org/webrtc/" + state_class_fragment;
-  return JavaEnumFromIndex(jni, FindClass(jni, state_class.c_str()),
-                           state_class, index);
-}
-
 std::string GetJavaEnumName(JNIEnv* jni,
                             const std::string& className,
                             jobject j_enum) {