Add dest length parameter to utf16_to_utf8 ยท dustb1n/android_external_mm-dash@31c3d26

CYNGNOS-3235 Change-Id: Id777c8d087038cd98524786245d33d3ca7733ad4 (cherry picked from commit e078b3abadb11dbf0c8f6dc18ffcf7fe9c2fab59)