Modify gralloc0 implementation

Add validateBufferSize and getTransportSize

Bug: 131089111
Test: build, boot
Change-Id: I14a6516af8e267ca22e530173623eff9b34abb47
diff --git a/gralloc/gralloc.cpp b/gralloc/gralloc.cpp
index 07bbfba..791d90f 100644
--- a/gralloc/gralloc.cpp
+++ b/gralloc/gralloc.cpp
@@ -89,6 +89,8 @@
         .unregisterBuffer = gralloc_unregister_buffer,
         .lock = gralloc_lock,
         .unlock = gralloc_unlock,
+        .validateBufferSize = NULL,
+        .getTransportSize = NULL,
     },
     .framebuffer = 0,
     .flags = 0,