With five unanimous thumbs up, officials on Tuesday agreed to let Facebook foot the bill for a full-time sworn police officer to work out of a substation near the social media giant’s new campus. Menlo Park police Chief Robert Jonsen called it a “benchmark in private-public partnerships” that will result in a highly visible patrol in the Belle Haven neighborhood, an area that has a lower socioeconomic status than the rest of the city and a higher crime rate.