Sepolicy: Fix camera & surface flinger denials

Device node were not proper /dev/msm_camera was
labelled as audio_device which is wrong and
/dev/msm_rotator as well as audio_device, so
changing the label to appropriate to fix the false positive
denials.

Change-Id: I7b3ebbcb9999d794823ee7c0d7cad330d50be02e