setPaused() will notify a change only when paused value changes.

Author: Hideki Itakura

src/main/java/com/couchbase/lite/replicator/ChangeTracker.java

@@ -594,8 +594,10 @@ public Map<String, Object> changesFeedPOSTBodyMap() {
     public void setPaused(boolean paused) {
         Log.v(Log.TAG, "setPaused: " + paused);
         synchronized (pausedObj) {
-            this.paused = paused;
-            pausedObj.notifyAll();
+            if(this.paused != paused) {
+                this.paused = paused;
+                pausedObj.notifyAll();
+            }
         }
     }