Make VtsHalNeuralnetworksTargetTest run on the host

This change adds a host build of VtsHalNeuralnetworksTargetTest. In the
existing device build of VtsHalNeuralnetworksTargetTest, the drivers run
out-of-process. In the host build of VtsHalNeuralnetworkaTargetTest, the
driver runs in-process.

The in-process driver that runs on the host is the canonical sample
driver (which is just the CPU "driver", located in
packages/modules/NeuralNetworks/driver/sample) adapted to an AIDL
interface (by the adapter code in
hardware/interfaces/neuralnetworks/utils/adapter/aidl).

Bug: N/A
Test: mma
Test: VtsHalNeuralnetworksTargetTest on host
Change-Id: Ia30dd3a7db8e0592b9f13d69c9831f8ffe10c371