38296 use common emulator/device list (cla: yes, t: flutter driver, tool, waiting for tree to go green)

38325 refactor flutter upgrade to be 2 part, with the second part re-entrant (cla: yes, tool)

38326 Re-enabling post-submit gold tests on mac (a: tests, cla: yes, framework)

38339 [flutter_tool] Flip create language defaults to swift and kotlin (cla: yes, tool)

38342 remove bsdiff from  BUILD.gn (cla: yes, tool)

38348 Analyzer fix that wasn’t caught in the PR originally (cla: yes, d: examples, f: material design, team, team: gallery)

38353 [flutter_tool] Observatory connection error handling cleanup (cla: yes, tool)