display: display-state-transition: Relocate trans_table to core

display: display-state-transition: Relocate trans_table to core

trans_table is used for getting next display state according to event type.
It has following display state for a specific event in the current display state.

To get and set display state, these functions are added to below display-state-transition.
int display_state_transition_get_next_transition_display_state(enum state_t from_state, enum state_t *to_state, int evt_type);
int display_state_transition_set_transition_table_display_state(enum state_t display_state, enum state_t set_state, int evt_type);

Change-Id: I013a63b6059748b58db04e7b52e8366615c6b1ac
Signed-off-by: Yunhee Seo <yuni.seo@samsung.com>