ACTION_STATE_APPROVED - The action has been approved.
ACTION_STATE_DONE - The action has been completed successfully.
ACTION_STATE_EXPIRED - The action has expired and is no longer valid.
ACTION_STATE_FAILED - The action has failed.
ACTION_STATE_PENDING - The action is pending and has not yet been processed.
ACTION_STATE_PROCESSING - The action is currently being processed.
ACTION_STATE_REJECTED - The action has been rejected.
ACTION_STATE_UNSPECIFIED - The default state, used when the state is not specified.
ActionState enum represents the various states an action can be in.