Which functions in the Android Bionic grant access to hardware (camera, microphone, etc.)?

[Shira Berman]

I am writing a code that requires changing the functions in the Bionic that access resources such as the camera, microphone, location, contacts, and more (for academic research purposes).

I am having a hard time finding these functions, since there is barely any documentation on-line.

Could anyone provide information about the names/locations of those functions?