All libraries exported via dynamic_interface.yaml (except 'dart:'
libraries) are now always compiled, as if they were specified
using --source flag on the gen_kernel / frontend_server command line.
This makes sure that exported libraries would be available for
dynamic modules even if they are not used in the host app.
TEST=pkg/dynamic_modules/test
Fixes b/452833638
Change-Id: I513a75bea76a18a3591613ecd68e7307e66a7c24
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/458586
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Nate Biggs <natebiggs@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>