20450 Revert “Refactor initial route code (#19684)” (cla: yes, platform-ios)

20451 Populates fuchsia node actions in semantics updates. (cla: yes)

20455 Send locale information in the Windows embedding (affects: desktop, cla: yes, platform-windows)

20459 Fix broken symbols on Fuchsia embedder (cla: yes)

20460 Add enabled flag for try builders (cla: yes)

20461 Send locale information in the macOS embedding (affects: desktop, cla: yes, platform-macos)

20465 Do not access members after calling ClearDartWrapper (cla: yes, waiting for tree to go green)

20466 Add a service protocol for raster cache memory (cla: yes, perf: memory, severe: performance)