Freeze neuralnetworks AIDL version as v3 for FL7

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

(This cherry pick required hand editing to change
makefile references from android.hardware.neuralnetworks-V2-ndk to
android.hardware.neuralnetworks-V3-ndk.)

Bug: 202280925

Test: adb shell NeuralNetworksTest_static
Test: atest VtsHalNeuralnetworksTargetTest
Merged-In: I2b2755d7376bb847b15b395e280bf352b5b9ef55
Change-Id: I2b2755d7376bb847b15b395e280bf352b5b9ef55
(cherry picked from commit 68e4300c)