IVGCVSW-2315 Add DebugLayer and no-op factory method

Change-Id: I5455b720565248ff94278e76887d63f8434a7b58
diff --git a/Android.mk b/Android.mk
index ad27aeb..6d265dc 100644
--- a/Android.mk
+++ b/Android.mk
@@ -86,6 +86,7 @@
         src/armnn/layers/Convolution2dLayer.cpp \
         src/armnn/layers/ConvertFp16ToFp32Layer.cpp \
         src/armnn/layers/ConvertFp32ToFp16Layer.cpp \
+        src/armnn/layers/DebugLayer.cpp \
         src/armnn/layers/DepthwiseConvolution2dLayer.cpp \
         src/armnn/layers/FakeQuantizationLayer.cpp \
         src/armnn/layers/FloorLayer.cpp \