Add new op PAD_V2

Bug: 113561890
Test: NeuralNetworksTest_static
Change-Id: I34351d6ff5fae0a13e3e883ca42210c534418ff3
diff --git a/neuralnetworks/1.2/types.hal b/neuralnetworks/1.2/types.hal
index fc2b540..ecd99cc 100644
--- a/neuralnetworks/1.2/types.hal
+++ b/neuralnetworks/1.2/types.hal
@@ -29,6 +29,7 @@
     // TODO: Sync docs.
     ARGMAX = 38,
     ARGMIN = 39,
+    PAD_V2 = 40,
 };
 
 /**