[webapi][XWALK-1745] Add 1 test, update 1 test and change another one to designed
Add a test Speech_setCBListener_exist.
Create a usage test file Speech_vocalizeString_setCBListener-manual.html by using API directly rather than "MediaPlayer" widget which was removed from ELF image.
Move back a test file SpeechRecognition_constructor.html to "designed" because this API is not supported yet.
Impacted tests (arrpoved): new 4, update 0, delete 1
Unit test Platform: Tizen IVI
Unit test result summary: pass 3, fail 1, blocked 0

Signed-off-by: Hao yunfeix <yunfeix.hao@intel.com>