35495 mark windows and macos chrome dev mode as flaky (cla: yes, team)

35496 [Material] Text scale and wide label fixes for Slider and Range Slider value indicator shape (cla: yes, f: material design)

35499 Added MaterialApp.themeMode to control which theme is used. (cla: yes, f: material design, framework)

35548 Various doc fixes (cla: yes, framework)

35556 ios (iPhone6) and iPhone XS tiles_scroll_perf tests (cla: yes, severe: performance, team, ⌺‬ platform-ios)

35560 Support for elevation based dark theme overlay color in the Material widget (cla: yes, f: material design, framework)

35573 update packages (cla: yes, team)