ci/android: download S3_ANDROID_ARTIFACT_NAME in cuttlefish-runner.sh

Downloading the android artifacts separately is really a peculiarity of
cuttlefish jobs, where we need mesa artifacts for both the host and the
guest.

So move the separate download of android artifacts to
cuttlefish-runner.sh

This aligns with the .test-android definition being cuttlefish specific,
and it also matches the original comment in that definition regarding
S3_ANDROID_ARTIFACT_NAME.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35380>
2 files changed