plugin-api: deviced: Add display DPMS attribute and enum

plugin-api: deviced: Add display DPMS attribute and enum

New attribute:
 - id: DEVICED_DISPLAY_ATTR_INT_DPMS_STATE
 - type: SYSCOMMON_RESMAN_DATA_TYPE_INT
 - setter: O
 - getter: O
 It sets/gets DPMS value type of enum deviced_dpms_state.

New attribute:
 - id: DEVICED_DISPLAY_ATTR_TUPLE2_SET_DISPLAY_DIRECT
 - type: SYSCOMMON_RESMAN_DATA_TYPE_UINT64_UINT64
 - setter: O
 - getter: X
 - 1st param: enum deviced_dpms_state
 - 2nd param: enum deviced_event
 It bypasses display state transition routine. Instead it sets DPMS
 directly.

Change-Id: I077c4066288f8e0f8856e4f78bbc6e7e1283f3e6
Signed-off-by: Youngjae Cho <y0.cho@samsung.com>