MFC r343905:
Improve Bluetooth device discovery support for Android and Microsoft devices.

Tested using the virtual_bt_speaker(8) tool from the virtual_oss(8)
project at github.com.

PR: 210089
Sponsored by: Mellanox Technologies

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Teach sdpd(8) about 32-bit and 128-bit uuid's.

MFC after: 3 days

Import sdpd(8) sources. This is Bluetooth Service Discovery Protocol daemon.
Extend libsdp(3) API to allow service registration and removal.
Fix uninitialized variable bug in sdpcontrol(8).

Reviewed by: imp (mentor)
No objection: ru