[Update: Microphone will be blocked too] Android P will block background apps from accessing the camera
(Android Police)

Update 1: 2018/02/22 6:37pm PST As spotted by XDA Developers, it looks like Android P will also block idle background apps from accessing the microphone. Needless to say, the possibility that an app We still don`t have much solid information about the next release of Android — we`ve heard that Android P could have some notch optimizations and that access to undocumented APIs could get blocked, but we don`t really know too much more than that. Read More[Update: Microphone will be blocked too] Android P will block background apps from accessing the camera was written by the awesome team at Android Police.