Summary:
We need to use the most recent Android SDK to leverage the cmake-based NDK build
system. Also, since everything seems to be still working - why not?
I also changed the dependency of `yoga-layout` to be the project, not the
pre-published artifact as it no longer compiled due to the changed measure API
signature. I'm not sure if there was a reason to keep the two separate.
By relying on Maven-published artifacts, we generate better POMs when publishing
and people can override dependencies and see them more easily.
A few more cleanups based on what we did with Litho.
Reviewed By: emilsjolander
Differential Revision: D4913208
fbshipit-source-id: 053deb444ce91106afb3b66c3be28d6fcbdea450