floss: Disconnect GATT in DisconnectAllEnabledProfiles

DisconnectAllEnabledProfiles should cause the device to be disconnected
on baseband.

Bug: 301164021
Tag: #floss
Test: mmm packages/modules/Bluetooth
Test: Lock DUT screen and make sure a GATT connection for SmartLock;
      btclient -c 'device disconnect <addr>'; GATT is disconnected.
Change-Id: I8816c5eaac9bf339b7114fa852f7179daab0bb45