sdm: Add interface for set/get instance of HdrInterface

For HDRLib 2.0, ColorManager will set hdr parameters
to HDRLib. So ColorManager need to get instance of
HdrInterface via SDM because of it's not singleton.

Change-Id: Iec72d58b17e71f747caa06076a6545ba6c5df0bc
diff --git a/sdm/include/private/color_interface.h b/sdm/include/private/color_interface.h
index 165c093..884df5e 100644
--- a/sdm/include/private/color_interface.h
+++ b/sdm/include/private/color_interface.h
@@ -57,6 +57,8 @@
                                                     void* data) = 0;
   virtual DisplayError ColorIntfSetActiveColorParam(uint32_t hint, uint32_t display_id,
                                                     void* data) = 0;
+  virtual DisplayError ColorIntfSetHdrInterface(void *hdr_intf) = 0;
+
  protected:
   virtual ~ColorModeInterface() {}
 };