Revert "Temporarily enable HWUI opengl validation"

This reverts commit 39aa790f744d504dfcafbf5e9224b7d9906067e4.

Seems to have broken all builds on master. Unclear why the presubmit
succeeded.

Test: make

Change-Id: I1ff8472495b5aafe6c1c89c1c8385d94ae584685
diff --git a/libs/hwui/Android.bp b/libs/hwui/Android.bp
index 5ef2a5b..07ff27d 100644
--- a/libs/hwui/Android.bp
+++ b/libs/hwui/Android.bp
@@ -9,7 +9,7 @@
         // Enables fine-grained GLES error checking
         // If enabled, every GLES call is wrapped & error checked
         // Has moderate overhead
-        "hwui_enable_opengl-validation",
+        //"hwui_enable_opengl-validation",
     ],
 
     cflags: [