Freeze neuralnetworks AIDL version as v2 for FL6

$ m android.hardware.neuralnetworks-update-api
$ m android.hardware.neuralnetworks-freeze-api

Bug: 203055646

Test: NeuralNetworksTest_static
Test: VtsHalNeuralnetworksTargetTest
Change-Id: I35dbd32695acdffc552790dc7396bc8c724e9242
42 files changed