Move VtsHalNeuralnetworksV1_2/3TargetTest to group presubmit-large

The test config takes longer than 15mins to run. Move it to a dedicated
group for running slow presubmit Test Mapping test.

Bug: 174654670
Test: none
Change-Id: I11574377ed28676475321c4c84feccf5b33f08c3
diff --git a/neuralnetworks/TEST_MAPPING b/neuralnetworks/TEST_MAPPING
index 0cefffa..ca5041d 100644
--- a/neuralnetworks/TEST_MAPPING
+++ b/neuralnetworks/TEST_MAPPING
@@ -21,7 +21,9 @@
           "include-filter": "-*sample_float_fast*:*sample_float_slow*:*sample_minimal*:*sample_quant*"
         }
       ]
-    },
+    }
+  ],
+  "presubmit-large": [
     {
       "name": "VtsHalNeuralnetworksV1_2TargetTest",
       "options": [