build(deps): bump rexml in /app/android in the bundler group

Bumps the bundler group in /app/android with 1 update: [rexml](https://github.com/ruby/rexml).


Updates `rexml` from 3.3.8 to 3.3.9
- [Release notes](https://github.com/ruby/rexml/releases)
- [Changelog](https://github.com/ruby/rexml/blob/master/NEWS.md)
- [Commits](ruby/rexml@v3.3.8...v3.3.9)

---
updated-dependencies:
- dependency-name: rexml
  dependency-type: indirect
  dependency-group: bundler
...

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