CBLT-159:  prepare_release_android jobs now have defaults build numbers per edition

Change-Id: Ie2142562689e9f4683d5533e3ea8421fd85a4046
Reviewed-on: http://review.couchbase.org/37910
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>