Glop ColorFilter & VertexBuffer support, initial enable

Enables Glop rendering for supported Rects and VertexBuffers
Also removes unused Query object

Change-Id: Ibe227bc362685a153159f75077664f0947764e06
diff --git a/libs/hwui/Dither.h b/libs/hwui/Dither.h
index facd1ea..b589b80 100644
--- a/libs/hwui/Dither.h
+++ b/libs/hwui/Dither.h
@@ -23,6 +23,7 @@
 namespace uirenderer {
 
 class Caches;
+class Extensions;
 class Program;
 
 // Must be a power of two