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

77204 Roll Engine from cd0e54348b61 to 72bbc5d92ce1 (cla: yes, engine)

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

77228 Add Windows desktop files for manual tests (a: desktop, cla: yes, platform-windows, team)

77230 Add supported custom font formats in official docs (cla: yes, framework, waiting for tree to go green)

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