Reworked Connect

    async def connect(self):
        """ Connect to an Android TV device.

        Will attempt to establish ADB connection to the given host.
        Failure sets state to UNKNOWN and disables sending actions.
        """
        try:
            if self.adbkey:
                self._adb = AsyncADBConnection(self.host, self.adbkey)
            else:
                self._adb = AsyncADBConnection(self.host)

            if not self.package_launcher:
                with self._adb:
                    await self._adb.command(self.home())
                    self.package_launcher = await self._adb.command(self.current_app)
        except socket_error as serr:
            logging.warning("Couldn't connect to host: %s, error: %s", self.host, serr.strerror)