add android project

4 jobs for master in 1 minute and 4 seconds (queued for 4 seconds)
Name Stage Failure
failed
build Build
       If you're stilling having trouble, please submit a ticket so we can help:
https://help.heroku.com

Thanks,
Heroku

The command '/bin/sh -c /bin/herokuish buildpack build' returned a non-zero code: 1
Cleaning up file based variables
ERROR: Job failed: exit code 1
failed
test Test
       code, please submit a ticket so we can help: https://help.heroku.com
You can also try reverting to the previous version of the buildpack by running:
$ heroku buildpacks:set https://github.com/heroku/heroku-buildpack-gradle#previous-version

Thanks,
Heroku

Cleaning up file based variables
ERROR: Job failed: exit code 1