Summary: Use fbjni for safer and easier jni bridging. This diff includes all of fbjni as it currently does not live as its own open source project. The code was copied from the react-native open source distribution.
Reviewed By: ritzau
Differential Revision: D3764065
fbshipit-source-id: 7ff566af314dcb5279460c322c476ef6f6ed8131
Summary: allow_unsafe_import was added to internal builds. add no-op version for open source
Reviewed By: IanChilds
Differential Revision: D3714497
fbshipit-source-id: fac9710726fd981d442c84c5b5879a94b955d102
Summary: Add jni bindings for csslayout. First step in many of removing LayoutEngine.java and performing all layout in native.
Reviewed By: lucasr
Differential Revision: D3648793
fbshipit-source-id: d0e696e196fa7c63109c9117a65645ca3d6c9c00
