Add UserInteractionEnabled property on actor for controlling user interaction.

Add UserInteractionEnabled property on actor for controlling user interaction.

actor can be disabled touch event by setting SetSensitive(false),
and also can be disabled keyboard event by setting
SetKeyboardFocusable(false),
and touch focus on SetTouchFocusable(false).

but we do not provide universal user interaction controls to disable
actor events and behavior, so this property is neceesary.

regardless of value on Sensitive or Focusable,
UserInteractionEnable has high priority over the negative action.

Change-Id: Ia339cc4c94e2fa36f80cb8672aa16d7a664c858c