Move bluetooth_device domains to hci_attach_dev domain.

In the interest of minimizing per-device policy, relabel
/dev/smd2 and /dev/smd3 as hci_attach_dev domains.

Change-Id: Iaa511a8610672994482d39b5064a8c7d0d1a90c2
Signed-off-by: rpcraig <rpcraig@tycho.ncsc.mil>