77194 [flutter_releases] Fix symlinks in prepare_packages script (a: tests, cla: yes, engine, f: cupertino, f: material design, framework, team, tool)

77202 [template] removes unused import from Kotlin and Android pluign template (cla: yes, tool, waiting for tree to go green)

77220 [flutter_tools] Generalize waitForExtension (cla: yes, tool)

77261 [flutter_tools] dont crash when looking for AS4.1 on windows with no LOCALAPPDATA (cla: yes, tool, waiting for tree to go green)

77264 [flutter_tools] remove several AndroidSdk Mocks (cla: yes, tool, waiting for tree to go green)

77316 Delete unzipped FlutterMacOS.framework before replacing artifact (cla: yes, platform-mac, tool, waiting for tree to go green)