BY MADISON FELLER Brittany Packnett Cunningham wasn’t looking for the fame that sometimes comes with being an activist in 2020. She started her career as an educator who took a senior role at Teach for America in her mid-20s. Then in 2014, after a police officer killed 18-year-old Michael Brown, Packnett Cunningham gained recognition as one of the organizers of the Ferguson protests.…