Update buffer dimensions with new dimension

Add case GRALLOC_MODULE_PERFORM_UPDATE_BUFFER_GEOMETRY in
gralloc_perform function to update the new buffer dimensions.

Change-Id: I7a855dc017dd042dda2abdc28c51ce5ec919fceb
diff --git a/libgralloc/gralloc_priv.h b/libgralloc/gralloc_priv.h
index 59fbd30..1d4c3c7 100644
--- a/libgralloc/gralloc_priv.h
+++ b/libgralloc/gralloc_priv.h
@@ -81,7 +81,8 @@
 enum {
     /* Gralloc perform enums
     */
-    GRALLOC_MODULE_PERFORM_CREATE_HANDLE_FROM_BUFFER = 0x080000001,
+    GRALLOC_MODULE_PERFORM_CREATE_HANDLE_FROM_BUFFER =
+                                    GRALLOC_MODULE_PERFORM_PRIVATE_START,
 };
 
 #define GRALLOC_HEAP_MASK   (GRALLOC_USAGE_PRIVATE_UI_CONTIG_HEAP |\