Added stubs for simple Steam Controller support

Android.mk

@@ -31,6 +31,8 @@ LOCAL_SRC_FILES := \
 	$(wildcard $(LOCAL_PATH)/src/haptic/android/*.c) \
 	$(wildcard $(LOCAL_PATH)/src/joystick/*.c) \
 	$(wildcard $(LOCAL_PATH)/src/joystick/android/*.c) \
+	$(LOCAL_PATH)/src/joystick/steam/SDL_steamcontroller.c \
+	$(LOCAL_PATH)/src/joystick/steam/steamcontroller_hidapi.c \
 	$(wildcard $(LOCAL_PATH)/src/loadso/dlopen/*.c) \
 	$(wildcard $(LOCAL_PATH)/src/power/*.c) \
 	$(wildcard $(LOCAL_PATH)/src/power/android/*.c) \
@@ -44,7 +46,9 @@ LOCAL_SRC_FILES := \
 	$(wildcard $(LOCAL_PATH)/src/timer/unix/*.c) \
 	$(wildcard $(LOCAL_PATH)/src/video/*.c) \
 	$(wildcard $(LOCAL_PATH)/src/video/android/*.c) \
-	$(wildcard $(LOCAL_PATH)/src/test/*.c))
+	$(wildcard $(LOCAL_PATH)/src/test/*.c)) \
+
+LOCAL_SHARED_LIBRARIES := hidapi
 
 LOCAL_CFLAGS += -DGL_GLEXT_PROTOTYPES
 LOCAL_LDLIBS := -ldl -lGLESv1_CM -lGLESv2 -llog -landroid