Bump app/jni/SDL from db29975 to aa9b4ec

Bumps [app/jni/SDL](https://github.com/libsdl-org/SDL) from `db29975` to `aa9b4ec`.
- [Release notes](https://github.com/libsdl-org/SDL/releases)
- [Commits](libsdl-org/SDL@db29975...aa9b4ec)

---
updated-dependencies:
- dependency-name: app/jni/SDL
  dependency-type: direct:production
...

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