Fix String Parameter Receive a unicode

Add unicode encode to parameter to make sure unicode will be
accepted correctly.

Change-Id: Idc9afad7971eaf0320d719946a3f09b8e15c1479
Closes-Bug: #1330370
(cherry picked from commit 7b8d32d58195a2b9098c837fe997d334e2529b8d)
Merge "Fix String Parameter Receive a unicode" into stable/icehouse