Dan Field 0e6c8fa761 Scenario nnbd (flutter/engine#27365)
* Revert "Revert "NNBD migration for scenario_app (#27362)" (#27364)"

This reverts commit 919219937bdebdc126383991202e5a883831998e.

* analysis issues

* no sound null safety because frontend_server is not
2021-07-13 13:46:53 -07:00
..