26900 Make reassemble public (cla: yes, framework)

26901 Add Dismissible.confirmDismiss callback (cla: yes, f: material design, framework)

26904 Fix immediately overriding the user’s chosen AM/PM selection (cla: yes, f: cupertino, f: date/time picker, framework, waiting for tree to go green)

26911 Dismissible not dismissable (cla: yes, team, team: gallery)

26913 Upgrade the Gradle script to Android plugin version 3.3.0 (cla: yes, team)

26921 fix some bad indentations (cla: yes, team)

26926 Roll engine to 10eb972fc15b8a3f97ed7c26032cae03b10fca2c (cla: yes)