Bluetooth: Mesh: Filter out unknown conns and disconns in pb-gatt srv
Bluetooth: Mesh: Filter out unknown conns and disconns in pb-gatt srv

Ensure that another established connection with the mesh device don't
mess up pb-gatt server state.

Signed-off-by: Pavel Vasilyev <09eaab7002a868ff10244a9e1218e073869f50ea@nordicsemi.no>

zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr