Compile health hal with the VNDK.

Test: builds with BOARD_VNDK_VERSION=current
Change-Id: I38ea5afed47026f6068e9aac5de3435ec031f836
diff --git a/health/1.0/default/Android.mk b/health/1.0/default/Android.mk
index 96ff91f..199ab41 100644
--- a/health/1.0/default/Android.mk
+++ b/health/1.0/default/Android.mk
@@ -4,10 +4,12 @@
 LOCAL_MODULE := android.hardware.health@1.0-impl
 LOCAL_PROPRIETARY_MODULE := true
 LOCAL_MODULE_RELATIVE_PATH := hw
-LOCAL_C_INCLUDES := system/core/healthd/include system/core/base/include
+LOCAL_C_INCLUDES := system/core/base/include
 LOCAL_SRC_FILES := \
     Health.cpp \
 
+LOCAL_HEADER_LIBRARIES := libhealthd_headers
+
 LOCAL_SHARED_LIBRARIES := \
     libcutils \
     libhidlbase \
@@ -23,20 +25,6 @@
 include $(BUILD_SHARED_LIBRARY)
 
 include $(CLEAR_VARS)
-LOCAL_MODULE := android.hardware.health@1.0-convert
-LOCAL_SRC_FILES := convert.cpp
-LOCAL_C_INCLUDES := system/core/healthd/include system/core/base/include
-LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
-LOCAL_SHARED_LIBRARIES := \
-    libcutils \
-    libhidlbase \
-    libhidltransport \
-    libutils \
-    android.hardware.health@1.0 \
-
-include $(BUILD_STATIC_LIBRARY)
-
-include $(CLEAR_VARS)
 LOCAL_PROPRIETARY_MODULE := true
 LOCAL_MODULE_RELATIVE_PATH := hw
 LOCAL_MODULE := android.hardware.health@1.0-service