Replacing return value to null

Author: rajeevkumar-nr

NewRelicVideoCore/src/main/java/com/newrelic/videoagent/core/NRDef.java

@@ -15,6 +15,8 @@ private NRDef() {
 
     public static final String SRC = "ANDROID";
 
+    public static final String SRC = "ANDROID";
+
     public static final String TRACKER_READY = "TRACKER_READY";
     public static final String PLAYER_READY = "PLAYER_READY";