meta-*: bump layers/sw/meta-flutter from 1bb5fb5 to bf37f37

Bumps [layers/sw/meta-flutter](https://github.com/meta-flutter/meta-flutter) from `1bb5fb5` to `bf37f37`.
- [Release notes](https://github.com/meta-flutter/meta-flutter/releases)
- [Commits](meta-flutter/meta-flutter@1bb5fb5...bf37f37)

---
updated-dependencies:
- dependency-name: layers/sw/meta-flutter
  dependency-version: bf37f37e856b7f8c2d8761db9d73cf9117ae848d
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]