Add shader program selection shortcut

Add a key manipulation that makes black text/paths use the standard
simple bitmap/patch shader, since they are the same. Previously we'd
create a separate shader for each because the keys differed, even
though the shaders were functionally equivalent.

Also fixes some issues around setting DEBUG_PROGRAM

Change-Id: I0c77c684d58da03501ee9ab8239c7d4a70fd6b5c
diff --git a/libs/hwui/Program.h b/libs/hwui/Program.h
index 13ee336..e8b6d47 100644
--- a/libs/hwui/Program.h
+++ b/libs/hwui/Program.h
@@ -24,6 +24,7 @@
 
 #include <SkXfermode.h>
 
+#include "Debug.h"
 #include "Matrix.h"
 #include "Properties.h"