IVGCVSW-6420: Constant flag in tensor info is not set correctly

!android-nn-driver:6532
!armnn-internal-tests:372451

  * Made fix to 2 out of 3 ConstTensor() constructors in Tensor.hpp to
    throw InvalidArgumentException when TensorInfo isConstant parameter
    is false.
  * Added new ConstTensor() constructor in Tensor.cpp to accept vector<>.data()
    using template<typename MemoryType>.
  * Fixed runtime->GetOutputTensorInfo()/GetInputTensorInfo() methods and
    called submethods to return TensorInfo& rather than TensorInfo.
  * Fixed all failing unit tests for CpuRef/CpuAcc/GpuAcc to ensure any
    ConstTensor created has it's TensorInfo isConstant set to true.
  * Added unit tests in TensorTest.cpp to ensure ConstTensor constructors
    throw InvalidArgumentException when TensorInfo isConstat parameter is
    false.
  * Added unit test to ensure an empty ConstTensor constructor will set
    TensorInfo isConatant to true.
  * Indentation fixes.
  * Fix to arm_tensor.i to add isConstant parameter to TensorInfo
    constructor. Added methods IsConstant() and SetConstant().
  * Fix to const_tensor.py to throw ValueError when TensorInfo
    isConstant is set to false when constructing a ConstTensor.
  * Fixed PyArmnn unit tests to set TensorInfo isConstant to
    True when ConstTensor is used.
  * Added unit tests in test_const_tensor.py to ensure ConstTensor
    constructors throw ValueError when TensorInfo isConstat parameter
    is false.

Signed-off-by: Cathal Corbett <cathal.corbett@arm.com>
Change-Id: I44e440dd0422c366d31bbdbc77ad2b4db0bde148
diff --git a/src/backends/backendsCommon/test/OptimizedNetworkTests.cpp b/src/backends/backendsCommon/test/OptimizedNetworkTests.cpp
index b0ee9be..6eecaab 100644
--- a/src/backends/backendsCommon/test/OptimizedNetworkTests.cpp
+++ b/src/backends/backendsCommon/test/OptimizedNetworkTests.cpp
@@ -370,8 +370,8 @@
     const armnn::TensorInfo inputInfo ({ 1, 5, 5, 1 }, armnn::DataType::Float32);
     const armnn::TensorInfo outputInfo({ 1, 2, 2, 1 }, armnn::DataType::Float32);
 
-    const armnn::TensorInfo weightsInfo({ 1, 3, 3, 1 }, armnn::DataType::Float32);
-    const armnn::TensorInfo biasesInfo ({ 1 }, armnn::DataType::Float32);
+    const armnn::TensorInfo weightsInfo({ 1, 3, 3, 1 }, armnn::DataType::Float32, 0.0f, 0, true);
+    const armnn::TensorInfo biasesInfo ({ 1 }, armnn::DataType::Float32, 0.0f, 0, true);
 
     std::vector<float> weightsData = GenerateRandomData<float>(weightsInfo.GetNumElements());
     armnn::ConstTensor weights(weightsInfo, weightsData);
@@ -443,10 +443,12 @@
     std::vector<float> inputData = GenerateRandomData<float>(runtime->GetInputTensorInfo(optNetId, 0).GetNumElements());
     std::vector<float> outputData(runtime->GetOutputTensorInfo(optNetId, 0).GetNumElements());
 
+    armnn::TensorInfo inputTensorInfo = runtime->GetInputTensorInfo(optNetId, 0);
+    inputTensorInfo.SetConstant(true);
     armnn::InputTensors inputTensors
     {
         {
-            0 ,armnn::ConstTensor(runtime->GetInputTensorInfo(optNetId, 0), inputData.data())
+            0, armnn::ConstTensor(inputTensorInfo, inputData.data())
         }
     };
     armnn::OutputTensors outputTensors
@@ -464,10 +466,12 @@
         armnn::NetworkId netId = networkIds[i];
         std::vector<float> copyOutputData(runtime->GetOutputTensorInfo(netId, 0).GetNumElements());
 
+        armnn::TensorInfo inputTensorInfo2 = runtime->GetInputTensorInfo(netId, 0);
+        inputTensorInfo2.SetConstant(true);
         armnn::InputTensors copyInputTensors
         {
             {
-                0, armnn::ConstTensor(runtime->GetInputTensorInfo(netId, 0), inputData.data())
+                0, armnn::ConstTensor(inputTensorInfo2, inputData.data())
             }
         };
         armnn::OutputTensors copyOutputTensors