How do I get rid of the APD Newsreader add that keeps popping up and blocking my phone?
It's a virus.
If you have the possibility, go to Settings > Security and scroll down to locate Device Administrators. Access that section and uncheck anything you see about APD, then connect to a network and download Malwarebytes AntiMalware from the Play Store. Scan your phone and the malware should be removed.
Play Store link for Malwarebytes AntiMalware: https://play.google.com/store/apps/details?id=org.malwarebytes.antimalware&hl=en