liblight: Add brightness level extension support

Add brightness level extension API to set backlight
through display API. The feature is enabled by property.

Change-Id: Ia6911433705cc946ed73ffc820396c350e3c8b88
diff --git a/liblight/Android.mk b/liblight/Android.mk
index ff4825b..aa09187 100644
--- a/liblight/Android.mk
+++ b/liblight/Android.mk
@@ -17,9 +17,12 @@
 # hw/<COPYPIX_HARDWARE_MODULE_ID>.<ro.board.platform>.so
 include $(CLEAR_VARS)
 
-LOCAL_SRC_FILES := lights.c
+LOCAL_C_INCLUDES += $(TARGET_OUT_HEADERS)/common/inc
+LOCAL_C_INCLUDES += $(TARGET_OUT_HEADERS)/qdcm/inc
+
+LOCAL_SRC_FILES := lights.c lights_prv.cpp
 LOCAL_MODULE_RELATIVE_PATH := hw
-LOCAL_SHARED_LIBRARIES := liblog
+LOCAL_SHARED_LIBRARIES := liblog libcutils libsdm-disp-apis
 LOCAL_CFLAGS := -DLOG_TAG=\"qdlights\"
 LOCAL_CLANG  := true
 LOCAL_MODULE := lights.$(TARGET_BOARD_PLATFORM)