Make all event emitters async

* Also remove AbortableEventEmitter

examples/run_cig_setup.py

@@ -19,12 +19,8 @@ import asyncio
 import logging
 import sys
 import os
-from bumble.device import (
-    Device,
-    Connection,
-    AdvertisingParameters,
-    AdvertisingEventProperties,
-)
+from bumble import utils
+from bumble.device import Device, Connection
 from bumble.hci import (
     OwnAddressType,
 )
@@ -79,7 +75,9 @@ async def main() -> None:
     def on_cis_request(
         connection: Connection, cis_handle: int, _cig_id: int, _cis_id: int
     ):
-        connection.abort_on('disconnection', devices[0].accept_cis_request(cis_handle))
+        utils.cancel_on_event(
+            connection, 'disconnection', devices[0].accept_cis_request(cis_handle)
+        )
 
     devices[0].on('cis_request', on_cis_request)
 

examples/run_hfp_handsfree.py

@@ -25,6 +25,7 @@ import websockets
 import functools
 from typing import Optional
 
+from bumble import utils
 from bumble import rfcomm
 from bumble import hci
 from bumble.device import Device, Connection
@@ -60,7 +61,8 @@ def on_dlc(dlc: rfcomm.DLC, configuration: hfp.HfConfiguration):
             else:
                 raise RuntimeError("unknown active codec")
 
-            connection.abort_on(
+            utils.cancel_on_event(
+                connection,
                 'disconnection',
                 connection.device.send_command(
                     hci.HCI_Enhanced_Accept_Synchronous_Connection_Request_Command(

examples/run_mcp_client.py

@@ -22,6 +22,7 @@ import os
 import websockets
 import json
 
+from bumble import utils
 from bumble.core import AdvertisingData
 from bumble.device import (
     Device,
@@ -169,7 +170,7 @@ async def main() -> None:
                     mcp.on('track_position', on_track_position)
                     await mcp.subscribe_characteristics()
 
-            connection.abort_on('disconnection', on_connection_async())
+            utils.cancel_on_event(connection, 'disconnection', on_connection_async())
 
         device.on('connection', on_connection)