[#ANDROID-132] Fix optional survey validation, and send button validation.
Update changelog.
Check strings file into parent message center branch,fix dependencies.
Check in Italian translation.
Allow messages to contain links.
Check in all ten language translations.
Use ellipses.
Fix tests. Check in tests IntelliJ module file.
Merge branch 'master' into message_center_1_0
[#ANDROID-143] Rating logic does not respect 0 values