The Fuchsia artifact builder didn't allow the end user to add more packages to build for Fuchsia. The current default is building only the platform-specific packages; but packages like `flutter/shell/common:shell_tests` are also defined for Fuchsia but not compiled by default. This change makes it less of a hassle to compile such packages.
GetBoundingRectAfterMutations to EmbeddedViewParams to calculate the final bounding rect for platform view (#19170)" (#19204)
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