[Tizen][Runtime] Add list apps with status.

Add option -s(--status) to xwalkctl for list apps with status.

Since tizen common have mutliuser, the user may want to know
the status of all his(her) applications.

And the old command xwalkctl(without any option) still work(some
test cases might use the result string of xwalkctl and I do not
want to break they).
This and the other constants could be `static const char[]`s instead.