ticket:10012: Added a test for getDetactableCharsets.

git-svn-id: http://source.icu-project.org/repos/icu/icu/branches/yoshito@34339 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10012: Minor API doc comment update.

git-svn-id: http://source.icu-project.org/repos/icu/icu/branches/yoshito@34346 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10012: Delete the work branch.

git-svn-id: http://source.icu-project.org/repos/icu/icu/branches/yoshito@34352 251d0590-4201-4cf1-90de-194747b24ca1