Revert "RISCV64: Disable V in NeuralNetworks/tools" am: 09a0c2cf68

Original change: https://android-review.googlesource.com/c/platform/packages/modules/NeuralNetworks/+/2966487

Change-Id: Ifae8722ea24daf2746a48adf0f10c99d2a92f4f9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>