Name core/fxge/android files appropriately and use one file per class

core/fxge/android/fx_android_imp.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#include "core/fxcrt/fx_system.h"
-
-#if _FX_OS_ == _FX_ANDROID_
+#include "core/fxge/cfx_gemodule.h"
 
 #include <memory>
 #include <utility>
 
-#include "core/fxge/android/fpf_skiamodule.h"
-#include "core/fxge/android/fx_android_font.h"
-#include "core/fxge/cfx_gemodule.h"
+#include "core/fxge/android/cfpf_skiadevicemodule.h"
+#include "core/fxge/android/cfx_androidfontinfo.h"
 
 void CFX_GEModule::InitPlatform() {
   CFPF_SkiaDeviceModule* pDeviceModule = CFPF_GetSkiaDeviceModule();
   if (!pDeviceModule)
     return;
 
   CFPF_SkiaFontMgr* pFontMgr = pDeviceModule->GetFontMgr();
   if (pFontMgr) {
     std::unique_ptr<CFX_AndroidFontInfo> pFontInfo(new CFX_AndroidFontInfo);
     pFontInfo->Init(pFontMgr);
     m_pFontMgr->SetSystemFontInfo(std::move(pFontInfo));
   }
   m_pPlatformData = pDeviceModule;
 }
 
 void CFX_GEModule::DestroyPlatform() {
   if (m_pPlatformData)
     static_cast<CFPF_SkiaDeviceModule*>(m_pPlatformData)->Destroy();
 }
-
-#endif  // _FX_OS_ == _FX_ANDROID_