composer: enable POMS during Doze switch based on a property

Add support to enable the POMS during Doze switch based on the
property vendor.display.enable_poms_during_doze=1.

Change-Id: Ia90ae0b38aed9e45d0729a38cab89a58c3baf66b
diff --git a/include/display_properties.h b/include/display_properties.h
index d0868a2..0e57f34 100644
--- a/include/display_properties.h
+++ b/include/display_properties.h
@@ -131,5 +131,6 @@
 #define DEFER_FPS_FRAME_COUNT                DISPLAY_PROP("defer_fps_frame_count")
 #define DISABLE_IDLE_TIME_VIDEO              DISPLAY_PROP("disable_idle_time_video")
 #define DISABLE_IDLE_TIME_HDR                DISPLAY_PROP("disable_idle_time_hdr")
+#define ENABLE_POMS_DURING_DOZE              DISPLAY_PROP("enable_poms_during_doze")
 
 #endif  // __DISPLAY_PROPERTIES_H__