The Buffalo Bills bolstered their offensive line depth by signing La’el Collins to a one-year deal. Collins, 30, previously worked out with the Bills towards the end of the regular season but ended up joining the Dallas Cowboys’ practice squad. Despite grappling with injuries lately, Collins sees an opportunity to revitalize his career with the Bills. Here’s what fans should know about the team’s latest addition. In addition to working out for the Bills in late December last season, Collins considered joining the Bills as a UDFA in 2015. Rex…