Bug 1097088 - Write test Battery Turn on Automatically options

Can you combine <code>tap_turn_on_auto()</code> with <code>select</code> into a method called <code>select_battery_option</code> or sth similar? 
See https://github.com/mozilla-b2g/gaia/blob/master/tests/python/gaia-ui-tests/gaiatest/apps/settings/regions/language.py#L33 for an example.