IVGCVSW-4624 Add a RANK Reference Implementation

 * Add Rank front end
 * Add Rank reference implementation
 * Add Rank serialization support
 * Add Scalar serialization support

Signed-off-by: Finn Williams <Finn.Williams@arm.com>
Change-Id: I06e4a468c2a84e79bae2e6c5348596bbbf853b4b
diff --git a/Android.mk b/Android.mk
index 31fda2f..38b2ad4 100644
--- a/Android.mk
+++ b/Android.mk
@@ -180,6 +180,7 @@
         src/armnn/layers/QLstmLayer.cpp \
         src/armnn/layers/QuantizeLayer.cpp \
         src/armnn/layers/QuantizedLstmLayer.cpp \
+        src/armnn/layers/RankLayer.cpp \
         src/armnn/layers/ReshapeLayer.cpp \
         src/armnn/layers/ResizeLayer.cpp \
         src/armnn/layers/SliceLayer.cpp \