[ReactNative] Fix bridge event dedupe

React/Base/RCTJavaScriptExecutor.h

@@ -49,6 +49,15 @@ typedef void (^RCTJavaScriptCallback)(id json, NSError *error);
  */
 - (void)executeBlockOnJavaScriptQueue:(dispatch_block_t)block;
 
+@optional
+
+/**
+ * Special case for Timers + ContextExecutor - instead of the default
+ *   if jsthread then call else dispatch call on jsthread
+ * ensure the call is made async on the jsthread
+ */
+- (void)executeAsyncBlockOnJavaScriptQueue:(dispatch_block_t)block;
+
 @end
 
 static const char *RCTJavaScriptExecutorID = "RCTJavaScriptExecutorID";