NeuralNetworks: pin cpp_std to gnu++17 am: 9e136a0ea1 am: 2005d6bf8c am: e18c423632

Original change: https://android-review.googlesource.com/c/platform/packages/modules/NeuralNetworks/+/2833230

Change-Id: Ia59dbeff1cfbf7fa5f2047a7f88c900d176ffca2
Signed-off-by: Automerger Merge Worker <[email protected]>