Merge "PTS-bot: fix failure during reset"

        # Note: we don't keep a single gRPC channel instance in the IUT class

        # because reset is allowed to close the gRPC server.

        with grpc.insecure_channel(f'localhost:{self.port}') as channel:

            Host(channel).Reset(wait_for_ready=True)

            self._retry(Host(channel).Reset)(wait_for_ready=True)

    def __exit__(self, exc_type, exc_value, exc_traceback):

        self._a2dp = None

    @property

    def address(self) -> bytes:

        """Bluetooth MAC address of the IUT."""

        with grpc.insecure_channel(f'localhost:{self.port}') as channel:

    def _retry(self, func):

        def wrapper(*args, **kwargs):

            tries = 0

            while True:

                try:

                    return Host(channel).ReadLocalAddress(

                        wait_for_ready=True).address

                    return func(*args, **kwargs)

                except grpc.RpcError or grpc._channel._InactiveRpcError:

                    tries += 1

                    if tries >= MAX_RETRIES:

                        raise

                    else:

                        print('Retry', tries, 'of', MAX_RETRIES)

                        print(f'Retry {func.__name__}: {tries}/{MAX_RETRIES}')

                        time.sleep(1)

        return wrapper

    @property

    def address(self) -> bytes:

        """Bluetooth MAC address of the IUT."""

        with grpc.insecure_channel(f'localhost:{self.port}') as channel:

            return self._retry(

                Host(channel).ReadLocalAddress)(wait_for_ready=True).address

    def interact(self,

                 pts_address: bytes,