cros_mark_android_as_stable: initial version

Initial version to uprev Android ebuilds from the gs bucket.

BUG=b:24972874
TEST=cros_mark_android_as_stable uprevs android-container, test passes

Change-Id: Ibba664b3c71eac82e1424c3236045ebcc30204e5
Reviewed-on: https://chromium-review.googlesource.com/324189
Commit-Ready: David Riley <davidriley@chromium.org>
Tested-by: David Riley <davidriley@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
5 files changed