Confirm the add to app sample project works as expeceted when bumped to API 36.
Fixes [#165161](https://github.com/flutter/flutter/issues/165161)
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Part 1/n https://github.com/flutter/flutter/issues/152374
## Pre-launch Checklist
- [x] I read the [Flutter Style Guide] _recently_, and have followed its
advice.
- [x] I signed the [CLA].
- [x] I read the [Contributors Guide].
- [x] I updated/added relevant documentation (doc comments with `///`).
- [ ] All existing and new tests are passing.