Create configStore SF useContextPriority

Change-Id: I154604428488a5824f6aadd4a6b43a72b327e280
diff --git a/configstore/1.0/ISurfaceFlingerConfigs.hal b/configstore/1.0/ISurfaceFlingerConfigs.hal
index 318590d..4c1a5a6 100644
--- a/configstore/1.0/ISurfaceFlingerConfigs.hal
+++ b/configstore/1.0/ISurfaceFlingerConfigs.hal
@@ -41,4 +41,10 @@
     vsyncSfEventPhaseOffsetNs() generates (OptionalInt64 value);
 
     useTripleFramebuffer() generates (OptionalBool value);
+
+    /*
+     * Instruct the Render Engine to use EGL_IMG_context_priority hint if
+     * availabe.
+     */
+    useContextPriority() generates(OptionalBool value);
 };