MLCE-144 Cts NNAPI test cases failed

 * Fixed numerous CTS/VTS failures related to Quantization

!armnn:2316

Signed-off-by: Mike Kelly <mike.kelly@arm.com>
Change-Id: I50b7edf42e416abd230783a5081d1a6511bc42d4
diff --git a/Utils.cpp b/Utils.cpp
index 246d641..229f35b 100644
--- a/Utils.cpp
+++ b/Utils.cpp
@@ -129,6 +129,9 @@
         case V1_2::OperandType::TENSOR_QUANT8_ASYMM:
             type = armnn::DataType::QuantisedAsymm8;
             break;
+        case V1_2::OperandType::TENSOR_QUANT8_SYMM:
+            type = armnn::DataType::QuantisedSymm8;
+            break;
         case V1_2::OperandType::TENSOR_QUANT16_SYMM:
             type = armnn::DataType::QuantisedSymm16;
             break;