Add control flow support to NNAPI VTS tests

See change I98a3edd1.

Bug: 148077633
Bug: 148601177
Bug: 136735929
Test: VtsHalNeuralnetworksV1_0TargetTest
Test: VtsHalNeuralnetworksV1_1TargetTest
Test: VtsHalNeuralnetworksV1_2TargetTest
Test: VtsHalNeuralnetworksV1_3TargetTest
Change-Id: I1e436cdba404b68026a45797ac4fb3a34f8be76a
Merged-In: I1e436cdba404b68026a45797ac4fb3a34f8be76a
(cherry picked from commit 1f98e2e9)