Rename SonarUtil file and method to Flipper

Summary: Rename SonarUtil file and method to Flipper

Reviewed By: passy

Differential Revision: D9920194

fbshipit-source-id: 3d1e360ccce613b7fbba10fb6b1fcaf0f15442a7

iOS/SonarKit/FlipperUtil.m

@@ -0,0 +1,18 @@
+/*
+ *  Copyright (c) 2018-present, Facebook, Inc.
+ *
+ *  This source code is licensed under the MIT license found in the LICENSE
+ *  file in the root directory of this source tree.
+ *
+ */
+#import <Foundation/Foundation.h>
+#import "FlipperPlugin.h"
+
+void FlipperPerformBlockOnMainThread(void(^block)())
+{
+  if ([NSThread isMainThread]) {
+    block();
+  } else {
+    dispatch_async(dispatch_get_main_queue(), block);
+  }
+}