Added tizenscim input context plugin.

Now it's the only input context plugin available on mobile
and emulator.

Change-Id: I621a58e752d3851226891a9a7eb8d7e89b3cd5fb
Reviewed-by: Jarosław Staniek <staniek@kde.org>
Reviewed-by: Tomasz Olszak <olszak.tomasz@gmail.com>