Launcher3: Can't search out local app by Chinese

Description:
chinest content type is Character.OTHER_LETTER.
When key matches,it check the content type. And
if type is Character.OTHER_LETTER, it doesn't
support search and break.

When the content type is Character.OTHER_LETTER,
make it work normally.

Change-Id: I56f8963a9dca24854dab0777be1ea0b54a126fe0
CRs-Fixed: 1105245