Log ReactContext counters

Reviewed By: AaaChiuuu

Differential Revision: D4501870

fbshipit-source-id: 97a5ece611a8d0d4049c63306382f56cac90434b

ReactAndroid/src/main/java/com/facebook/react/uimanager/UIImplementation.java

@@ -775,7 +775,7 @@ public class UIImplementation {
       cssRoot.calculateLayout();
     } finally {
       Systrace.endSection(Systrace.TRACE_TAG_REACT_JAVA_BRIDGE);
-      mLayoutTimer = mLayoutTimer + ((double)System.nanoTime() - startTime)/ 1000000000.0;
+      mLayoutTimer = mLayoutTimer + ((double)System.nanoTime() - startTime) / 1000000.0;
       mLayoutCount = mLayoutCount + 1;
     }
   }