Consider using the Windows structuring for Android's `Android` module

[compnerd]

Description

We currently install android.modulemap, SwiftBionic.h, and SwiftAndroidNDK.h into an architecture specific directory in /usr/lib/swift. We should consider adopting the Windows layout of installing these files into /usr/share instead. These are architecture agnostic and there is little value in replicating them into architecture specific directories.

Additional information

No response

[etcwilde]

Since they are interfaces, why not under include/?

[compnerd]

They are not directly included, they are headers used by the clang importer to avoid properly modularising the Bionic module. We don't want to inject these headers into the user's default search paths.