Check camera permissions for any devices using the VIDEO class

Any USB devices that are of class VIDEO or have similar
interfaces should check whether the calling client has
camera permissions before granting access to the device.
The above restriction will apply for any packages that
target P or above.

Bug: 27367690
Test: Manual using 3-rd party USB webcam applications.
Change-Id: I7b4f808d344cae33fde93e6d81c7cceed523e24a