27687 Fix a typo in https://github.com/flutter/engine/pull/27311 (cla: yes, waiting for tree to go green, platform-windows, needs tests)

27694 UWP: Fix uwptools that does not uninstall package (cla: yes, platform-windows, needs tests)

27760 Do not call CoreWindow::Visible from raster thread (cla: yes, platform-windows, needs tests)

27786 fix crash SemanticsObject dealloc and access the children (platform-ios, cla: yes, waiting for tree to go green, needs tests)

27872 [web] Don’t reset history on hot restart (cla: yes, platform-web, needs tests, cp: 2.5)

27878 Fix wrong EGL value in AndroidEnvironmentGL (platform-android, cla: yes, waiting for tree to go green, needs tests)