Uninstall package

        Args:
            - package_name(string): package name ex: com.example.demo
            - keep_data(bool): keep the data and cache directories

def app_uninstall(self, package_name, keep_data=False):
        """
        Uninstall package

        Args:
            - package_name(string): package name ex: com.example.demo
            - keep_data(bool): keep the data and cache directories
        """
        if keep_data:
            return self.run_cmd('uninstall', '-k', package_name)
        else:
            return self.run_cmd('uninstall', package_name)