Downgrade info logs to debug

src/python/grpcio/grpc/_cython/_cygrpc/aio/grpc_aio.pyx.pxi

@@ -77,7 +77,7 @@ cdef _actual_aio_initialization():
         _GRPC_ASYNCIO_ENGINE,
         _default_asyncio_engine(),
     )
-    _LOGGER.info('Using %s as I/O engine', _global_aio_state.engine)
+    _LOGGER.debug('Using %s as I/O engine', _global_aio_state.engine)
 
     # Initializes the process-level state accordingly
     if _global_aio_state.engine is AsyncIOEngine.CUSTOM_IO_MANAGER:

src/python/grpcio/grpc/_cython/_cygrpc/aio/server.pyx.pxi

@@ -494,7 +494,7 @@ async def _handle_exceptions(RPCState rpc_state, object rpc_coro, object loop):
     except asyncio.CancelledError:
         _LOGGER.debug('RPC cancelled for servicer method [%s]', _decode(rpc_state.method()))
     except _ServerStoppedError:
-        _LOGGER.info('Aborting RPC due to server stop.')
+        _LOGGER.debug('Aborting RPC due to server stop.')
     except Exception as e:
         _LOGGER.exception('Unexpected [%s] raised by servicer method [%s]' % (
             type(e).__name__,