Nets star Mikal Bridges said he’s doing everything to convince restricted free agent Cam Johnson to stay in Brooklyn. But Bridges doesn’t sign the checks. Nor does he have any control over competing offers. Speaking to reporters after autographing close to 200 posters and miscellaneous items as part of a community event with G Fuel just blocks away from Barclays Center, the 83-game man said he sends no shortage of reminders to Johnson, who is set to field multiple offer sheets this offseason.