Disable TEST_MAPPING for VtsHalNeuralnetworksV1_*TargetTest

A sibling change removes the NN HIDL sample drivers from cuttlefish. In
response, this change removes the VtsHalNeuralnetworksV1_*TargetTest
tests from the TEST_MAPPING because they do not test anything without
the NN HIDL sample drivers present.

Note that the NN AIDL sample drivers and NN AIDL VTS test
(VtsHalNeuralnetworksTargetTest) are still present.

Bug: 233665601
Test: mma
Test: croot && cd hardware/interfaces/neuralnetworks && atest
Change-Id: I90bccd843ba9296c27d3010cec652be55a13a225