fix for installing Android packages: install one package at a time.
fix for installing Android packages: install one package at a time.

As noted in the Dockerfile:
 (!!!) Only install one package at a time, as "echo y" will only work for one license!
       If you don't do it this way you might get "Unknown response" in the logs,
         but the android SDK tool **won't** fail, it'll just **NOT** install the package.

bitrise-docker/android,bitrise-io/docker-android