bluez5: set right transport active, do transport release syncronously, fix a meson check
spa: fix wrong meson check for BAP
bluez5: do transport release synchronously
Do transport release synchronously for simplicity. BlueZ handles releasing while acquire is pending, but acquire while release is pending would fail the acquire.
Otherwise we need to maintain an operation chain to handle trying to acquire/release while the other operation is pending. This makes things complex with little gained, as releases generally don't block for a long time.
bluez5: set right transport active when acquiring linked
The linked transport should be activated, the main one was already activated above.