Can android applications make unauthorized recording of audio / video with permissions to access the microphone / camera?

Question

Android

Hello.
I installed a toy for my son today and she requested access to the microphone / camera. The game has a feature where you can take a selfie with the character of the game, or he will repeat the words that you say. To do this, press the appropriate buttons.
I have questions:
- having such permissions, can the application make unauthorized (hidden from the user) recording of audio / video?
- How is the user protected from such actions by the OS?
- How to google this topic?
PS This is not paranoia, it just became interesting.