Add support for debug and profile context.

Change-Id: If67bc23b457d50ced7bfa5ac21a63d14de8193b9
diff --git a/rsDefines.h b/rsDefines.h
index 413f1ba..52f7d83 100644
--- a/rsDefines.h
+++ b/rsDefines.h
@@ -76,6 +76,12 @@
     RS_DEVICE_PARAM_COUNT
 };
 
+enum RsContextType {
+    RS_CONTEXT_TYPE_NORMAL,
+    RS_CONTEXT_TYPE_DEBUG,
+    RS_CONTEXT_TYPE_PROFILE
+};
+
 typedef struct {
     uint32_t colorMin;
     uint32_t colorPref;