audio: Drop LOCAL_COPY_HEADERS usage

LOCAL_COPY_HEADERS is deprecated, so remove all its usages
to avoid build warnings.

Change-Id: I4c52508e9109c5f448653fd5613a8991d28bbb2e
(cherry picked from commit 9abdcc75b4d8379e4b2d30a1068526e9dcae9425)
diff --git a/qahw_api/Android.mk b/qahw_api/Android.mk
index 30c326f..b51d822 100644
--- a/qahw_api/Android.mk
+++ b/qahw_api/Android.mk
@@ -9,7 +9,6 @@
 LOCAL_MODULE := libqahw
 LOCAL_MODULE_TAGS := optional
 LOCAL_C_INCLUDES   := $(libqahwapi-inc)
-LOCAL_C_INCLUDES += $(TARGET_OUT_HEADERS)/mm-audio/qahw/inc
 
 LOCAL_SRC_FILES := \
     src/qahw_api.cpp
@@ -20,6 +19,9 @@
 LOCAL_STATIC_LIBRARIES += libprofile_rt
 endif
 
+LOCAL_HEADER_LIBRARIES := \
+    libqahw_headers
+
 LOCAL_SHARED_LIBRARIES := \
     liblog \
     libcutils \
@@ -30,17 +32,6 @@
 
 LOCAL_CFLAGS += -Wall -Werror
 
-LOCAL_COPY_HEADERS_TO   := mm-audio/qahw_api/inc
-LOCAL_COPY_HEADERS      := inc/qahw_defs.h
-LOCAL_COPY_HEADERS      += inc/qahw_api.h
-LOCAL_COPY_HEADERS      += inc/qahw_effect_audiosphere.h
-LOCAL_COPY_HEADERS      += inc/qahw_effect_bassboost.h
-LOCAL_COPY_HEADERS      += inc/qahw_effect_environmentalreverb.h
-LOCAL_COPY_HEADERS      += inc/qahw_effect_equalizer.h
-LOCAL_COPY_HEADERS      += inc/qahw_effect_presetreverb.h
-LOCAL_COPY_HEADERS      += inc/qahw_effect_virtualizer.h
-LOCAL_COPY_HEADERS      += inc/qahw_effect_visualizer.h
-
 LOCAL_VENDOR_MODULE     := true
 
 ifneq ($(filter kona lahaina holi,$(TARGET_BOARD_PLATFORM)),)
@@ -48,6 +39,14 @@
 endif
 include $(BUILD_SHARED_LIBRARY)
 
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := libqahwapi_headers
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/inc
+LOCAL_PROPRIETARY_MODULE := true
+
+include $(BUILD_HEADER_LIBRARY)
+
 #test app compilation
 include $(LOCAL_PATH)/test/Android.mk