I think that @jjj is working on file system recovery and management tools. Maybe you can beta test the app for him?
You would need to join the partner program to test plug-ins that are not in the store. Once you unlock your camera, you may be able to use adb shell to access the Android OS and then delete the file with rm or Vysor and the built-in file manager
If you use Vysor, you can access the filesystem of your camera.
Go to the link below and look at the Tutorials - > Tutorial - Vysor
You can assess if this is something you want to try. If so, you’ll need to join the partner program to get your camera unlocked.