Fix AVDTP endpoint resource leak by clearing the in_use flag on stream close and abort commands.

bumble/avdtp.py

@@ -2039,6 +2039,7 @@ class Stream:
 
         if self.rtp_channel is None:
             # No channel to release, we're done
+            self.local_endpoint.in_use = 0
             self.change_state(State.IDLE)
         else:
             # TODO: set a timer as we wait for the RTP channel to be closed
@@ -2050,6 +2051,7 @@ class Stream:
         await self.local_endpoint.on_abort_command()
         if self.rtp_channel is None:
             # No need to wait
+            self.local_endpoint.in_use = 0
             self.change_state(State.IDLE)
         else:
             # Wait for the RTP channel to be closed