build(deps): bump external/smali from a4d1453 to f8e7dc0

Bumps [external/smali](https://github.com/google/smali) from `a4d1453` to `f8e7dc0`.
- [Release notes](https://github.com/google/smali/releases)
- [Commits](google/smali@a4d1453...f8e7dc0)

---
updated-dependencies:
- dependency-name: external/smali
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>