64978 devicelab: started averaging startup time for ios test (cla: yes, team, waiting for tree to go green)

64982 Update Gold for new endpoint (a: tests, cla: yes, framework, team, team: infra, waiting for tree to go green)

64984 Flutter stable framework 1.20.3 cherrypicks (a: internationalization, cla: yes, d: examples, engine, f: material design, framework, team, tool)

64988 Add observatory Bonjour service to built iOS Info.plist bundle (cla: yes, platform-ios, t: xcode, team, tool)

64990 Revert “Reland #61998 and update complex_layout ios files” (a: tests, cla: yes, framework, team)

65025 Move gen_l10n into flutter_tools (a: internationalization, cla: yes, team, tool)