fix more imports

Summary:
There are many files across fbobjc relying on -include_pch and therefore they miss Foundation.h and UIKit.h includes. This diff was generated by a codemod and fixes these missing includes.
More details on the missing imports https://fb.workplace.com/groups/929548250966094/permalink/981237982463787/

Changelog: [Internal]

Reviewed By: yannickl

Differential Revision: D37282740

fbshipit-source-id: 0f419025b3cf2f811e96ff464cb19e8e5a25aa09

React/Views/RCTViewUtils.h

@@ -6,6 +6,7 @@
  */
 
 #import <React/RCTDefines.h>
+#import <UIKit/UIKit.h>
 
 NS_ASSUME_NONNULL_BEGIN