68261 Fix screenshotting code (cla: yes, team)

68301 use_is_even_rather_than_modulo (a: accessibility, a: tests, cla: yes, f: material design, framework, team)

68302 enable unnecessary_string_escapes and use_raw_strings (a: internationalization, a: tests, cla: yes, f: cupertino, f: material design, framework, team, tool, waiting for tree to go green)

68324 Refactor command utilities for tests (cla: yes, team)

68333 [devicelab] Cocoon client (cla: yes, team, waiting for tree to go green)

68361 Build iOS apps using Swift Packages (cla: yes, d: examples, team, tool, waiting for tree to go green)