Add a new bits/ header to the Android overlay, include runtime libraries that are
auto-extracted and listed many times to the list of libraries to be de-duplicated,
enable a C++ interop test that's working again, and update the doc with new
libraries that need to be available to run a simple executable.
This commit doesn't install them yet, they will be installed and a whole Android NDK module will be built in a follow-up commit
This module map covers the Bionic C standard library and other Posix headers used in the Android NDK
