qdutils: Add display config to qdutils

This API is meant for system level users that need to get/set
various display attributes that are normally not available via
the regular Android framework channels.
Initially the APIs exposed are to check HDMI status, get display
attributes and set HSIC data.
Only physically connected displays are supported for now.

Change-Id: Ia783ce2ab0c4599a54c992171e01e2f0504550dc
diff --git a/libqservice/IQService.h b/libqservice/IQService.h
index 7ad443d..d6e525a 100644
--- a/libqservice/IQService.h
+++ b/libqservice/IQService.h
@@ -45,6 +45,9 @@
         SCREEN_REFRESH,          // Refresh screen through SF invalidate
         EXTERNAL_ORIENTATION,    // Set external orientation
         BUFFER_MIRRORMODE,       // Buffer mirrormode
+        CHECK_EXTERNAL_STATUS,   // Check status of external display
+        GET_DISPLAY_ATTRIBUTES,  // Get display attributes
+        SET_HSIC_DATA,           // Set HSIC on dspp
         VPU_COMMAND_LIST_START = 100, //Reserved block for VPU commands
         VPU_COMMAND_LIST_END   = 200,
         COMMAND_LIST_END = 400,