Sync React Native deviations

[hmallen99]

TODO: rebase to ir-engine/dev once ir-engine#1053 and #72 land

Summary

• Flags all deviations with the current upstream dev branch
• Uses .native.ts files in cases where browser APIs are used in a file in a way that breaks the React Native build
• Uses the isReactNative flag in cases where browser-only functionality can be skipped
• Adds a patch for Rapier for native code. This could instead be patched in the metro config if the deviations are not desired in the web code, though they should be compatible.