68714 Revert “enable unnecessary_string_escapes and use_raw_strings” (a: internationalization, a: tests, cla: yes, f: cupertino, f: material design, framework, team, tool)

68729 App.framework must support iOS 8 for older Flutter projects (cla: yes, d: examples, platform-ios, team, tool, waiting for tree to go green)

68737 Add a missing include to the Linux plugin template (cla: yes, tool, waiting for tree to go green)

68756 [flutter_tools] remove fallback discovery and observatory timeout (cla: yes, tool)

68774 [gen_l10n] Make resource attributes optional for simple cases (a: internationalization, cla: yes, tool)

68790 [devicelab] de-flake iOS launch (cla: yes, tool)