Tessellate on worker threads

Tessellate and cache (where possible) shadow and round rect
tessellation tasks.

Change-Id: I2cfda8e11d83d51ea74af871235cf26e8f831d40
diff --git a/libs/hwui/StatefulBaseRenderer.h b/libs/hwui/StatefulBaseRenderer.h
index 057006b..dbb1d85 100644
--- a/libs/hwui/StatefulBaseRenderer.h
+++ b/libs/hwui/StatefulBaseRenderer.h
@@ -69,6 +69,7 @@
     //        int alpha, SkXfermode::Mode mode, int flags);
 
     // Matrix
+    void getMatrix(Matrix4* outMatrix) const;
     virtual void getMatrix(SkMatrix* outMatrix) const;
     virtual void translate(float dx, float dy, float dz = 0.0f);
     virtual void rotate(float degrees);