Small speed up to checking connection in ClientResponse

The check should have been is not None here to avoid the __bool__ call
which is always True

aiohttp/client_reqrep.py

@@ -1018,7 +1018,7 @@ def _response_eof(self) -> None:
             return
 
         # protocol could be None because connection could be detached
-        protocol = self._connection and self._connection.protocol
+        protocol = self._connection is not None and self._connection.protocol
         if protocol is not None and protocol.upgraded:
             return
 
@@ -1140,7 +1140,7 @@ async def read(self) -> bytes:
         elif self._released:  # Response explicitly released
             raise ClientConnectionError("Connection closed")
 
-        protocol = self._connection and self._connection.protocol
+        protocol = self._connection is not None and self._connection.protocol
         if protocol is None or not protocol.upgraded:
             await self._wait_released()  # Underlying connection released
         return self._body