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

core/fxge/android/fpf_skiamodule.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/android/fpf_skiafontmgr.h"
-#include "core/fxge/android/fpf_skiamodule.h"
-
-namespace {
-
-CFPF_SkiaDeviceModule* gs_pPFModule = nullptr;
-
-}  // namespace
-
-CFPF_SkiaDeviceModule* CFPF_GetSkiaDeviceModule() {
-  if (!gs_pPFModule)
-    gs_pPFModule = new CFPF_SkiaDeviceModule;
-  return gs_pPFModule;
-}
-
-CFPF_SkiaDeviceModule::~CFPF_SkiaDeviceModule() {
-  delete m_pFontMgr;
-}
-
-void CFPF_SkiaDeviceModule::Destroy() {
-  delete gs_pPFModule;
-  gs_pPFModule = nullptr;
-}
-
-CFPF_SkiaFontMgr* CFPF_SkiaDeviceModule::GetFontMgr() {
-  if (!m_pFontMgr) {
-    m_pFontMgr = new CFPF_SkiaFontMgr;
-    if (!m_pFontMgr->InitFTLibrary()) {
-      delete m_pFontMgr;
-      return nullptr;
-    }
-  }
-  return m_pFontMgr;
-}
-
-#endif  // _FX_OS_ == _FX_ANDROID_