avicii: sepolicy: Allow CameraMDMHIDL to execute

* 04-07 03:35:05.521 10035 10035 W init: type=1400 audit(0.0:26621): avc: denied { execute } for name="vendor.oneplus.hardware.CameraMDMHIDL@1.0-service" dev="dm-7" ino=166 scontext=u:r:init:s0 tcontext=u:object_r:vendor_file:s0 tclass=file permissive=0

Change-Id: I2c553893b2411c21c596ae3a3b1016266cc79fa3