This directory contains all the "common" sources between the bluetooth daemon
and our client library. All source files here are under the "bluetooth"
subdirectory, which is the exported root path for the client static library.
Only common files should go here. All headers that go into common/bluetooth must
only include other headers from common/bluetooth and must use "bluetooth" as the
root path, e.g.:

#include <bluetooth/uuid.h>

This is so that client applications that link against the client library have
one common include path exported to them, and our headers can find eachother
within that.

It is however OK to include from the package root when including common headers
from source files as these are pre-compiled. For example,
common/bluetooth/adapter_state.cpp should do:

#include "service/common/bluetooth/adapter_state.h"
