configstore: allow to USE_CONTEXT_PRIORITY by device.

Fixes: 72007412
Test: manual

Change-Id: Id6135347ef699b27ab708d387261bc031996a476
diff --git a/configstore/1.0/default/surfaceflinger.mk b/configstore/1.0/default/surfaceflinger.mk
index 3ce768a..f7487d5 100644
--- a/configstore/1.0/default/surfaceflinger.mk
+++ b/configstore/1.0/default/surfaceflinger.mk
@@ -17,6 +17,10 @@
     LOCAL_CFLAGS += -DUSE_CONTEXT_PRIORITY=1
 endif
 
+ifeq ($(TARGET_USE_CONTEXT_PRIORITY),true)
+    LOCAL_CFLAGS += -DUSE_CONTEXT_PRIORITY=1
+endif
+
 ifeq ($(TARGET_HAS_WIDE_COLOR_DISPLAY),true)
     LOCAL_CFLAGS += -DHAS_WIDE_COLOR_DISPLAY
 endif