[ layer ] Enable mha gtest and match version

- Current mha layer at nntrainer/layer is not for general use, but implemented solely for LLaMA support.
- In order to run unittest for mha layer, return to previous version of mha layer, and move current implementation under Application/LLaMA

**Self evaluation:**
1. Build test:     [X]Passed [ ]Failed [ ]Skipped
2. Run test:     [X]Passed [ ]Failed [ ]Skipped

Signed-off-by: skykongkong8 <[email protected]>

Applications/LLaMA/jni/Android.mk

@@ -79,6 +79,26 @@ LOCAL_C_INCLUDES += $(NNTRAINER_INCLUDES)
 
 include $(BUILD_SHARED_LIBRARY)
 
+include $(CLEAR_VARS)
+
+LOCAL_ARM_NEON := true
+LOCAL_CFLAGS += -std=c++17 -Ofast -mcpu=cortex-a53 -Ilz4-nougat/lib -DENABLE_FP16=1 -DUSE__FP16=1
+LOCAL_LDFLAGS += -Llz4-nougat/lib/obj/local/$(TARGET_ARCH_ABI)/
+LOCAL_CXXFLAGS += -std=c++17 -frtti -DENABLE_FP16=1 -DUSE__FP16=1
+LOCAL_CFLAGS += -pthread -fexceptions -fopenmp -static-openmp -DENABLE_FP16=1 -DUSE__FP16=1
+LOCAL_LDFLAGS += -fexceptions -fopenmp -static-openmp -DENABLE_FP16=1 -DUSE__FP16=1
+LOCAL_MODULE_TAGS := optional
+LOCAL_ARM_MODE := arm
+LOCAL_MODULE := custom_multi_head_attention_layer
+LOCAL_LDLIBS := -llog -landroid -fopenmp -static-openmp -DENABLE_FP16=1 -DUSE__FP16=1
+
+LOCAL_SRC_FILES := custom_multi_head_attention_layer.cpp
+
+LOCAL_SHARED_LIBRARIES := nntrainer ccapi-nntrainer
+
+LOCAL_C_INCLUDES += $(NNTRAINER_INCLUDES)
+
+include $(BUILD_SHARED_LIBRARY)
 
 
 include $(CLEAR_VARS)
@@ -96,7 +116,7 @@ LOCAL_LDLIBS := -llog -landroid -fopenmp -static-openmp -DENABLE_FP16=1 -DUSE__F
 
 LOCAL_SRC_FILES := main.cpp 
 
-LOCAL_SHARED_LIBRARIES := nntrainer ccapi-nntrainer rms_norm_layer swiglu_layer
+LOCAL_SHARED_LIBRARIES := nntrainer ccapi-nntrainer rms_norm_layer swiglu_layer custom_multi_head_attention_layer
 
 LOCAL_C_INCLUDES += $(NNTRAINER_INCLUDES)