In Android framework, make tools depend on jsoncpp

tools/PictureResultsWriter.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  * Classes for writing out bench results in various formats.
  */
 #ifndef SkPictureResultsWriter_DEFINED
 #define SkPictureResultsWriter_DEFINED
@@ skipping 122 matching lines @@
                 currentLine.c_str(), timerTypes, numInnerLoops);
         results.append("\n");
         this->logProgress(results.c_str());
     }
     virtual void end() {}
 private:
     SkBenchLogger* fLogger;
     SkString currentLine;
 };
 
-#ifdef SK_BUILD_JSON_WRITER
 /**
  * This PictureResultsWriter collects data in a JSON node
  *
  * The format is something like
  * {
  *      benches: [
  *          {
  *              name: "Name_of_test"
  *              tilesets: [
  *                  {
@@ skipping 66 matching lines @@
        stream.writeText(Json::FastWriter().write(fRoot).c_str());
        stream.flush();
     }
 private:
     SkString fFilename;
     Json::Value fRoot;
     Json::Value *fCurrentBench;
     Json::Value *fCurrentTileSet;
     Json::Value *fCurrentTile;
 };
-#endif // SK_BUILD_JSON_WRITER
 
 #endif