Fix DBus connection leak

Moved the try in order to include the call to the add_device_watcher function, since it is able to throw an error when the device does not exists in bluez anymore. This causes the just opened dbus connection to not be properly closed.

CHANGELOG.rst

@@ -9,6 +9,9 @@ and this project adheres to `Semantic Versioning <https://semver.org/spec/v2.0.0
 
 `Unreleased`_
 =============
+Fixed
+-----
+* Fix DBus connection leak when trying to connect to a forgotten ble device
 
 `0.22.3`_ (2024-10-05)
 ======================

bleak/backends/bluezdbus/client.py

@@ -181,18 +181,18 @@ def on_value_changed(char_path: str, value: bytes) -> None:
                     if callback:
                         callback(bytearray(value))
 
-                watcher = manager.add_device_watcher(
-                    self._device_path, on_connected_changed, on_value_changed
-                )
-                self._remove_device_watcher = lambda: manager.remove_device_watcher(
-                    watcher
-                )
+                try:
+                    watcher = manager.add_device_watcher(
+                        self._device_path, on_connected_changed, on_value_changed
+                    )
+                    self._remove_device_watcher = lambda: manager.remove_device_watcher(
+                        watcher
+                    )
 
-                self._disconnect_monitor_event = local_disconnect_monitor_event = (
-                    asyncio.Event()
-                )
+                    self._disconnect_monitor_event = local_disconnect_monitor_event = (
+                        asyncio.Event()
+                    )
 
-                try:
                     try:
                         #
                         # The BlueZ backend does not disconnect devices when the