IVGCVSW-6124 ConstTensorsAsInput: Conv2d - FrontEnd

 * Update Front-end and Tools.
 * Updated Serializer, Deserializer and unit tests to reflect this.
 * Updated TfLiteDelegate, TfLiteParser and OnnxParser.
 * Updated Ref.
 * Fixed resulting Neon / CL tests
 * Unified optimizers for conv2d ops
 * Optimizer Fix - Fp32ToBf16
 * Partial implementation for ACL backends to fix VTS failures

!android-nn-driver:7477

Signed-off-by: Keith Davis <keith.davis@arm.com>
Change-Id: I5fb18877f7ee32643e15a9818945356274bb401b
diff --git a/src/backends/reference/RefLayerSupport.cpp b/src/backends/reference/RefLayerSupport.cpp
index f921383..8051dcf 100644
--- a/src/backends/reference/RefLayerSupport.cpp
+++ b/src/backends/reference/RefLayerSupport.cpp
@@ -1246,11 +1246,12 @@
 {
    bool supported = true;
 
-    std::array<DataType,4> supportedInputTypes = {
+    std::array<DataType,5> supportedInputTypes = {
         DataType::QAsymmS8,
         DataType::QAsymmU8,
         DataType::QSymmS8,
-        DataType::QSymmS16
+        DataType::QSymmS16,
+        DataType::Float16
     };
 
     supported &= CheckSupportRule(TypeAnyOf(input, supportedInputTypes), reasonIfUnsupported,