Rename quantized data types to remove ambiguity for signed/unsigned payloads

!android-nn-driver:2572

Change-Id: I8fe52ceb09987b3d05c539409510f535165455cc
Signed-off-by: Derek Lamberti <derek.lamberti@arm.com>
diff --git a/tests/ImageTensorGenerator/ImageTensorGenerator.cpp b/tests/ImageTensorGenerator/ImageTensorGenerator.cpp
index 4e8fe78..9c23200 100644
--- a/tests/ImageTensorGenerator/ImageTensorGenerator.cpp
+++ b/tests/ImageTensorGenerator/ImageTensorGenerator.cpp
@@ -225,7 +225,7 @@
         }
         else if (m_OutputType == "qasymm8")
         {
-            return armnn::DataType::QuantisedAsymm8;
+            return armnn::DataType::QAsymmU8;
         }
         else
         {
@@ -272,7 +272,7 @@
                 imageDataContainers.push_back(PrepareImageTensor<int>(
                     imagePath, newWidth, newHeight, normParams, batchSize, outputLayout));
                 break;
-            case armnn::DataType::QuantisedAsymm8:
+            case armnn::DataType::QAsymmU8:
                 imageDataContainers.push_back(PrepareImageTensor<uint8_t>(
                     imagePath, newWidth, newHeight, normParams, batchSize, outputLayout));
                 break;