[Connection Manager] Move libbluetooth_rs into stack

Rather than depending on libbluetooth-core, this exchanges the order
so that libbluetooth-core depends on libbluetooth_core_rs.

But since they are static libraries, circular symbol dependencies are
allowed, but header-only dependencies can only flow one way. This lets
C++ access types defined only in Rust, while the reverse direction
still works.

Bug: 272572974
Test: mm
Change-Id: I64d063520104c611374c467a66a9b516f36f334f