Remove VisualBench and its Android implementation.

tools/VisualBench/VisualModule.h

-/*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- *
- */
-
-#ifndef VisualModule_DEFINED
-#define VisualModule_DEFINED
-
-#include "SkRefCnt.h"
-
-class SkCanvas;
-
-/*
- * VisualModule is the base class for all of the various types of activities VisualBench supports.
- *
- * The common theme tying these all together is they need to display an image to the screen.  Later,
- * on we some modules will also be interactive
- */
-class VisualModule : public SkRefCnt {
-public:
-    virtual ~VisualModule() {}
-
-    virtual void draw(SkCanvas* canvas)=0;
-
-    virtual bool onHandleChar(SkUnichar unichar) = 0;
-
-private:
-    typedef SkRefCnt INHERITED;
-};
-
-#endif