fix: Add accidentally removed return value of wait_for_ecu()

src/gallia/uds/ecu.py

@@ -332,14 +332,16 @@ async def _wait_for_ecu(self, sleep_time: float) -> None:
     async def wait_for_ecu(
         self,
         timeout: Optional[float] = None,
-    ) -> None:
+    ) -> bool:
         """wait for ecu to be alive again (eg. after reset)
         Wait at most timeout"""
         t = timeout if timeout is not None else self.timeout
         try:
             await asyncio.wait_for(self._wait_for_ecu(t * 0.8), timeout=t)
+            return True
         except asyncio.TimeoutError:
             self.logger.log_critical("Timeout while waiting for ECU!")
+            return False
 
     async def update_state(
         self, request: service.UDSRequest, response: service.UDSResponse