[bluetooth] Extend base binding and implementation stacks to support server mode functionality

My PR #17099 is for a new binding to monitor and control Hunter Douglas Generation 3 shades via Bluetooth Low Energy. This binding has different behaviour depending on whether the shade has been integrated in the Powerview App:

If the shade is NOT in the App then the binding can always read and command the shade position.
If the shade IS in the App then the binding can read the position, but requires an encryption key from the App for commands.

Currently the only two ways to discover encryption key are to use Wireshark either a) live via an attached BLE sniffer board, or b) by uploading an HCI debug log file from an Android phone running in BLE debug mode. Neither of these methods is particularly user friendly.

In a future step I want the binding to emulate a Powerview BLE remote control so it can be added into the App and thus directly receive the encryption key from it.

The OH Bluetooth base binding and respective BlueZ and BlueGiga implementation stacks currently support Bluetooth client mode only (thus enabling them to talk to remote physical server devices). To emulate a remote control as described above it will require the base binding and the implementation stacks to be extended with additional Bluetooth server mode functionality.

Signed-off-by: AndrewFG software@whitebear.ch

openhab / openhab-addons

[bluetooth] Extend base binding and implementation stacks to support server mode functionality #17278