update test to try and reproduce issue #328
Merge pull request #334 from couchbase/feature/issue_328

update attachment test to try and reproduce issue #328
add couchbase-lite-java-listener to settings.gradle.example

This makes it easier to set up couchbase-lite-android for dev, since the
listener project is now required for the tests to compile.
Merge pull request #335 from mjq/fix_settings_gradle

Add couchbase-lite-java-listener to settings.gradle.example