Launcher3: Can't search out local app by Chinese

Description:
Chinese 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: I3713f24c9206fe16a8da2a23e6c90d68079dd533
Signed-off-by: Alexander Martinz <amartinz@shiftphones.com>