Summary:
Changelog: [Internal] Move Bridge-only constants into a separate file
- Move Bridge only constants from RCTBridge.h into RCTBridgeConstants.h.
- Move shared constants from RCTBridge.h into RCTConstants.h.
This way, new architecture does not need to import RCTBridge.h just for the constants.
Reviewed By: sammy-SC
Differential Revision: D39085713
fbshipit-source-id: 40177cbed72a326b40ec448c98751d1dd3464504