am a97a16be: am 68f1dce1: (-s ours) am 3986d5e3: Update ApiLevel-18 reference images to CtsThemeHostTestCases and delete CtsHoloTestCases

* commit 'a97a16bee3277b96ba836a8f1b653d7d638a2b41':
  Update ApiLevel-18 reference images to CtsThemeHostTestCases and delete CtsHoloTestCases