[SurfaceFlinger]Use configStore useContextPriority

Change-Id: I329b5da0e92822eb0878c8866c8ab87ea13f7e07
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index e5aa0bb..11d7c6f 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -128,6 +128,9 @@
     static int64_t vsyncPhaseOffsetNs;
     static int64_t sfVsyncPhaseOffsetNs;
 
+    // Instruct the Render Engine to use EGL_IMG_context_priority is available.
+    static bool useContextPriority;
+
     static char const* getServiceName() ANDROID_API {
         return "SurfaceFlinger";
     }