reduce visibility to default on methods

Author: davidmoten

src/main/java/rx/internal/operators/OnSubscribeRedo.java

@@ -399,7 +399,7 @@ public void request(long n) {
                 }
             }
         }
-        public void setProducer(Producer p) {
+        void setProducer(Producer p) {
             if (p == null) {
                 throw new NullPointerException();
             }
@@ -432,7 +432,7 @@ public void setProducer(Producer p) {
                 }
             }
         }
-        public void produced(long n) {
+        void produced(long n) {
             if (n <= 0) {
                 throw new IllegalArgumentException(n + " produced?!");
             }