display: Add API to set luminance

-Add API to set min/max luminance range for given display.
-using API via binder
 adb shell "vndservice call display.qservice 46 i32 <display_id>
 f <min_lum> f <max_lum>"

Change-Id: I97c31b18cac4ab8ac45518833d0964b7e54c9d58
diff --git a/libqservice/IQService.h b/libqservice/IQService.h
index e19eccc..387eaca 100644
--- a/libqservice/IQService.h
+++ b/libqservice/IQService.h
@@ -85,6 +85,7 @@
         GET_DSI_CLK = 43, // Get DSI Clk.
         GET_SUPPORTED_DSI_CLK = 44, // Get supported DSI Clk.
         SET_COLOR_MODE_FROM_CLIENT = 45, // Overrides the QDCM mode using the given mode ID
+        SET_PANEL_LUMINANCE = 46, // Set Panel Luminance attributes.
         COMMAND_LIST_END = 400,
     };