Freeze neuralnetworks AIDL version as v3 for FL7

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

Bug: 202280925

Test: adb shell NeuralNetworksTest_static
Test: atest VtsHalNeuralnetworksTargetTest
Change-Id: I2b2755d7376bb847b15b395e280bf352b5b9ef55
diff --git a/neuralnetworks/aidl/Android.bp b/neuralnetworks/aidl/Android.bp
index 065105a..aa4c4b6 100644
--- a/neuralnetworks/aidl/Android.bp
+++ b/neuralnetworks/aidl/Android.bp
@@ -38,5 +38,6 @@
     versions: [
         "1",
         "2",
+        "3",
     ],
 }