IVGCVSW-4549 Add front end for new QLSTM layer

* Added new layer QLstm (Android R HAL 1.3)
* Made necessary updates to APIs
* Added unit tests
* This layer is functionally equivalent to the
  original unquantized LSTM layer with some
  additonal quantization features added. Due
  to this, original LstmParams are used for
  this layer.

Signed-off-by: James Conroy <james.conroy@arm.com>
Change-Id: I5b7f2d2fb6e17e81573b41a31bc55f49ae79608f
diff --git a/Android.mk b/Android.mk
index 2370b33..0c2a420 100644
--- a/Android.mk
+++ b/Android.mk
@@ -167,6 +167,7 @@
         src/armnn/layers/Pooling2dLayer.cpp \
         src/armnn/layers/PreCompiledLayer.cpp \
         src/armnn/layers/PreluLayer.cpp \
+        src/armnn/layers/QLstmLayer.cpp \
         src/armnn/layers/QuantizeLayer.cpp \
         src/armnn/layers/QuantizedLstmLayer.cpp \
         src/armnn/layers/ReshapeLayer.cpp \