with the synchronous call, this actually blocks the Flutter component
from serving its out/directory and prevents the Inspect synchronous
discovery
DX-1568 #done #comment
TESTED=`fx shell run fuchsia-pkg://fuchsia.com/crasher_dart#meta/crasher_dart.cmx` (report id 0b59643af026bc37)
TESTED=`fx shell sessionctl add_mod fuchsia-pkg://fuchsia.com/crasher_flutter#meta/crasher_flutter.cmx` then clicked on "Th
Change-Id: I8b0abd1034dba66cd7bb1d6768322cab36ed453b
Ported from Topaz tree.