HALLOWELL, Maine — Gov. Janet Mills declined to say on Wednesday whether she had confidence in Maine’s embattled university system chancellor, adding that trustees will “do the right thing” as they consider renewing his contract.Three university faculties have cast votes of no confidence in Chancellor Dannel Malloy since the system did not inform a search committee that the administration hired to be the University of Maine at Augusta president had faced a similar vote at his current job in New York.