26312 Add logic for creating rollback dynamic patches. (cla: yes, t: gradle, tool, ▣ platform-android)

26313 Fix Listenable.merge to not leak (cla: yes, framework)

26315 Ensure that Dart SDK dirs have appropriate permissions (cla: yes, tool)

26332 Integrate Strut: Add StrutStyle, expose Strut API, wire up strut with dart:ui, Roll engine 31a7f4d..e7eb1c8 (7 commits) (a: text input, a: typography, cla: yes, framework, severe: API break)

26333 Add back lost gallery theme code (cla: yes, team, team: gallery, waiting for tree to go green)

26334 mark tests as not flaky (a: tests, cla: yes, team)