hal_neuralnetworks_armnn: allow GPU access

Neuralnetworks for armnn driver needs GPU access in order to issue
OpenCL commands to GPU. Add rule that allows this.

Fixes: 183673130
Test: setenforce 1, stop and start hal, see that hal started.
Change-Id: I9be0ee4326e5e128a37f2c4df0878f8fbbea7f8d
1 file changed