25988 Platform channels, eliminate objc copies (platform-ios, platform-android, cla: yes, waiting for tree to go green, platform-macos, platform-fuchsia, embedder)

26442 Add bottom view inset to FlutterWindowMetricsEvent (cla: yes, embedder)

26816 [metal] Remove invalid texture error message (cla: yes, embedder)

26828 Remove outdated annotations from fixtures (cla: yes, waiting for tree to go green, tech-debt, embedder)

26847 Add missing context switches in Rasterizer (cla: yes, embedder)

27048 Temporarily opt out of reduced shaders variants till roll issues are resolved. (cla: yes, waiting for tree to go green, needs tests, embedder)