CBLT-252:  call upload_android_artifacts.sh before using maven to create ZIP of JARs

Change-Id: If53828b980a3094308f594f4c8310ad6577e79e4
Reviewed-on: http://review.couchbase.org/35109
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>